JBL Control 1 summertime project surround array and more!

[JBL 4645]

Hears what I have been up to these past weeks.

It all started well I guess since my first trip to the Empire Leicester Square cinema 17 years ago, the site sound and presentation exceed my expectations to a new level, the cinema was billed as the best and one of the largest THX screens in the United Kingdom between 1989 and 1998.

Employing a fully 100% JBL sound system consisting of

JBL five-screen 4675-A x20 15” mid bass drivers

JBL five-screen 2360-A HF horns

JBL x8 4645 sub bass units

JBL x22 surrounds

JBL x15 6290 amplifies

Dolby CP-200

Dolby SR/A

THX 3417 crossover/monitor

Laser show was also included in the presentation that show cased the cinema as an Event, and it was clearly that, with sound that went beyond most home cinemas at that time and further.

After seeing the movie event of the year Indiana Jones and Last Crusade presented in six-track Dolby Stereo with split-surrounds and Lucasfilm THX sound system, every single low end sound was felt along with pin point directivity, from the front row to the sweet spot in the auditorium without a single loss in quality.

The amount of bitching I have heard over the years is rather incredible, those who keep claming there home cinema is better than the cinema, well a professional THX sound system cinema is a hard act to knock, and most home cinema owners are running miss matched loudspeakers placed at the front, not to mention poor placement.

Surrounds in the Empire play a huge and paramount role in the presentation; they really do reach the listener eras with clarity, so far the experiment, this project as met my expectations and is far from being complete, but for the meantime its doing wonders!

The total JBL complement at the moment is as follows

JBL Control 5’s x5 three-screen presently active, this September I will increase this to five-screen.

JBL Control 1’s x8 two on each sidewall at the present moment, with a further two to installed, taken the total to four per sidewall.

The centre back surround is comprised of four JBL control 1’s two of these are used for the centre back surround, note: the picture that I have placed hare, note the bottom part of the diagram shows the back half of the split-surrounds. The middle one shows which ones are running the centre back surrounds.

All the formatting for these channels is done manually; this only takes me a few seconds to perform.

JBL MR centre x1 upper centre channel this works by taking the central phantom signal from the mains left and right, this can only be achieved via using the RCA pre-outputs and sending them to a separate Dolby Pro-Logic from the Dolby Digital decoder, its all in the mix friends and it works!

JBL 4645 x1 Sub Bass Professional THX approved this as to be the highlight of the home cinema, but I’m sure the JBL control 1’s will be focused on more these next few weeks.

JBL HT-1F x1 inactive at the moment, awaiting final placement for this wonderful JBL loudspeaker!

[JBL 4645]

Hear is a image showing the left split-surround, r the side surround in a Dolby surround-EX centre back surround mode, where the central phantom signal is removed from the split-surrounds left and rights, this as you know gives a more open and more realistic surround sound.

[JBL 4645]

Hear is a image showing the Right split-surround, r the side surround in a Dolby surround-EX centre back surround mode, where the central phantom signal is removed from the split-surrounds left and rights, this as you know gives a more
open and more realistic surround sound.

[JBL 4645]

This wider angle shot taken as far back the home cinema as possible, shows the placement of the JBL control 1’s placed on the right side and the back wall.

[JBL 4645]

This wider angle shot taken as far back the home cinema as possible, shows the placement of the JBL control 1’s placed on the left side and the back wall.

[northwood]

we need more pics of ur theater:applaud:

[JBL 4645]

Northwood

Thank you very much, the rest of the pictures are in the “Photo Gallery” section of the JBL forums mate, But I will be including a whole lot more in this thread, as the JBL summertime project is far from being complete.

What can I say about it, the whole system is balanced, and the JBL control 1’s are the perfect surround loudspeaker, where size of the room is an issue, I was thinking about JBL 8830’s but I would still require x6 of them to go around room, two on each sidewall, and two on the back, but given there size and thou they can be picked up “second-hand” that means used, for around £99.99 UK!

So when I saw this mad and crazy offer going at the local “Richer Sounds Hi-Fi” shop in Boscombe, that’s small town just 1 ½ miles away from my home hare in Charminster, which is based in Bournemouth.

So can I turn down two JBL Control 1’s brand new in the box at £49.95 UK,:) no way, £70.00 UK pounds as been knocked of the retail price, and they only have around 1000 JBL control units left in stock!

LOL, But if I keep buying them up at a box a time they’ll be none left over! :D

[JBL 4645]

Northwood

Oh, if stay online, I’ll post the front view and give a visual presentation with little boxes and white lines saying which JBL does what, hold mate, this will take me around 40 minutes or less to design and edit the images in my photo folder. :)

[JBL 4645]

JBL Control 5 three-screen active 175 watts handling power, sensitivity 89db, frequency response 50Hz 20KHz.

This image was taken just now!

[JBL 4645]

JBL 4645, has been loaded with a newer JBL sub bass driver, the JBL 2240H. 18" 600 watts program power, sensitivity 98db frequency down to 18Hz cut-off 80Hz.

Maximum SPL that I usual play it at 115dbc, can go to 120dbc! Its great with the film Earthquake in Dolby Digital 5.1 (((Sensurround))) now with split-surrounds! :applaud:


JBL MR centre, upper centre channel this gets its signal from the use of the Dolby Pro-Logic which, this is a simple re-plugging, the whole system works in the six-track Dolby Digital domain!

[JBL 4645]

Note: JBL control 5 pending activation for left centre and right centre this September!

Aliens 1986, Now this film plays Just Bloody Loud! Maybe one of the best sound effect edited motion pictures of 1986, winner of the academy award for best visual effects, and sound effects editing, the six-track Dolby Stereo mix is indispensable! :applaud:

The film mix presented hare has split-surrounds, or stereo surrounds WOW!
All films are presented via the Lucasfilm THX sound system, and now that this home cinema is fully 100% JBL, motion picture soundtracks have never sounded better! :applaud:

[JBL 4645]

JBL fan since 1989!:applaud:

[johnaec]

You need a BIG, HD display now!!!

John

[duaneage]

Control 1's get little respect but they do sound good for what they are. The crossover network is hellish in it's design, I don't see what the fuse is going to protect the way it is wired.

Since the drivers can still be ordered new and are not terribly expensive you can really ride rough on them and not worry about getting replacement parts. I have a pair with the optional wall mounts. Mine are Control 1G , a model I bought in HK. I think they were a limited production run, the tweeters are a little different.

[northwood]

Study well and day day up revoltution for JBL

[JBL 4645]

duaneage

Well I know the fuse lights up on the JBL control 5’s and the JBL control 1’s, haven’t seen the JBL control 1’s light up as of yet, I have too many years experience with JBL control 5’s.

The sidewall JBL control1’s are wired in series, and the centre back is also wired in series.

The split-surrounds on the back wall half are wired directly from the Marantz 1030’s A speaker output, and the sides are on B speaker output.

At the present moment I’m watching “Aliens” with both A and B loudspeaker settings on, and there as not been a single problem, the bass line on the split-surrounds, with a timpani beat in the James Horner score, that’s on the end credits, is real heard throughout the room, there is no overwhelm of the information, that’s plainly down to the Dolby Pro-Logic decoder that I use for the centre back surround and the height surrounds as well.

The decoder is re-plugged and gets it’s surround signal from the Dolby Digital or the dts decoder, the Kenwood KRF-X9050D THX select is a wonderful AVR.

I have to do some more pictures with those crazy inserts, linking to what does what, well let me tell you I have worked in two cinemas as projectionist in the past, and re-plugging is no stranger to me, I do hope I haven’t confused anyone hare!

AS for the big screens, the only thing that will finish this off is a video projector, a perforated screen, and a THX baffle wall!:applaud:

So for now the SONY is stay right where she is, she’s old but she’ll hold!:)

[JBL 4645]

Northwood

Arr, Northwood so what do you think?

Where’s you avatar mate, hay, it’s not the same without it!?:)

[JBL 4645]

johnaec

Well someday, a video projector will be installed, but for now this is it, the image may look small, but the JBL sound system hare is ," Just Bloody Lives" up to its promise! :applaud:

[JBL 4645]

I’ll post more of the of this ultimate power in the universe, later in the day, I’m really to tired now, so later in day more to come!

May the JBL be with you! :applaud:

[northwood]

Northwood

Arr, Northwood so what do you think?

Where’s you avatar mate, hay, it’s not the same without it!?:)

gosh,I lost it
let me do it again:D

how's this one

[JBL 4645]

Northwood

LOL

Now let me guess, you hot linked the avatar form another site, hears a tip mate, save the picture to your (hard drive) then upload it to this site, that way you will always have the same avatar without the site crashing and the image disappearing!

But keep that one for now, cute I like it, but where’s his JBL badge?:D

[northwood]

Northwood

LOL

Now let me guess, you hot linked the avatar form another site, hears a tip mate, save the picture to your (hard drive) then upload it to this site, that way you will always have the same avatar without the site crashing and the image disappearing!

But keep that one for now, cute I like it, but where’s his JBL badge?:D


:D
U r right,thank you my brother

[JBL 4645]

Northwood


Hay, are you online with MSN, as I have just accepted you to my MSN messenger, fancy a live voice conversation?:applaud:

[JBL 4645]

Northwood

I have taken a little “timeout” to read some back issues of the THX monitor to refreshing my memory with “THX Monitor” the professional monthly reading digest, the information is laid out clearly and in-depth over four pages, the part that I’m is surround loudspeaker layout, also the JBL cinema manual, I just like this stuff, its all good stuff!:applaud:

[JBL 4645]

Inspired by the newly refitted Empire Leicester square which underwent a new makeover this summertime with a brand new THX specification, and with the technologies now on hand at some remarkable low prices at Turnkey, the time now seams right for me to make the next step a reality.

I have plans to install x8 Behringer A 500 over the New Year and finally replace my ole Marantz 1050 and 1030 where they have served a great purpose over the last 17 years and I feel that change is now in order to keep up with the times.

The plan is to go with a multiple configuration design of x8 A 500 Behringer.

x1 Left and Right Stereo
x2 Left centre Right centre Stereo
x3 Centre, Upper Centre
x4 Left side surround right side surround arrays
x5 Centre back surround array
x6 Height surround array
x7 Sub bass extension
x8 Sub bass LFE.1

Design is pending slight changes if costs change on the A 500 Behringer. but I’ll do my best to keep to the specification.

At £118.99 per amplifier it’s a rather tempting offer.

[JBL 4645]

http://www.geocities.com/Area51/Corridor/8289/leiano.jpg
"No, No you can’t possibly use x16 JBL control 1's for the surrounds!"

I’m getting that buzzing loving feeling whoa yeah bring it on! Thou the summertime JBL control 1 project was more a less on schedule and thou I pursed the project until I finally complete the surround array off with a further x8 more JBL control 1 which should give me an Empire Leicester square rocking feeling.

The THX baffle wall is one part of it that makes it all come together and work as a whole, this will be one of the other projects that would get fitted somewhere between all this. The materials for this are quite affordable and will give a more solid front sound stage then the sub stranded conventional ones where loudspeakers are just stuck up in front of the room with that hash sound!

http://www.thedentedhelmet.com/images/70mm/images/300/ANH-Galactic_Empire-01928-300.jpg
"This home JBL THX cinema is now the ultimate power in the neighbourhood, I suggest I use it!":D

[JBL 4645]

The JBL Control 1 wintertime surround array project 2 2007!

http://forum.ecoustics.com/bbs/messages/3/309533.jpg

Well I’ve decided too start early with the surround rather than doing this in the summertime so here it goes for tonight’s project if I can get these two installed for the height surround array which will consist of x10 JBL Control 1 with x4 for each section of the ceiling and finally ending up with just x2 towards the front.

http://forum.ecoustics.com/bbs/messages/3/309534.jpg

I’ll start of with wall plugging the ceiling and hope they stay up LOL, as it would be quite a bump on the head!

So far the array of just x8 is warm sounding and changes in the soundtrack on Apollo 13 where it cuts from mission control to the command module really changes the size of the surrounds it’s if the sound closes in all around me.

Again starting at just £49.98 for the JBL Control 1 this is one surround project that leaves my friends crawling in the dust!

I’ll replace the exciting height surrounds where there frequency response power handling is a little on the poor side. But they have severed very well since November 2005 where they was installed for Star Wars episode 3 Revenge of the Sith.

Well I have a new set now and by towards the end of the night I should have the height surrounds really starting to take there place wit some very cool sounding effects overhead!

http://forum.ecoustics.com/bbs/messages/3/309535.jpg

I’ll start in a few hours from now.

[JBL 4645]

Well firstly I measured the distance from the coving that goes around the sides of the ceiling from the inside. I have calculated around 26” from the edge of the coving to the first position of the JBL Control 1 height surround and 26” from the back wall this will hopeful place them in position where I can keep adding and adding on more until I reach the required number of x10 height surrounds.

http://forum.ecoustics.com/bbs/messages/3/309605.jpg

I had to remove the existing height surround one by one.

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The tools for the mission

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I took the liberty to have a look inside the new JBL Control 1 has this does differ from the earlier models, it appears to be lighter in weight. So I hope it stays put!

http://forum.ecoustics.com/bbs/messages/3/309610.jpg

Note the difference between this bass mid driver from a later JBL Control 1

http://forum.ecoustics.com/bbs/messages/3/309611.jpg

[JBL 4645]

I hate heights! What I mean is I’m not too comfortable with heights even at 2ft 2” off the floor I’m terrified. But just think what it’s going to sound like with a matching JBL Control1 surround array and with the heights the timbre matching of sounds will be awesome…

…I will have to patch up the ceiling due to some plaster braking away no big deal a tub of filler does amazing things these days. Cabling will be eventually tidied up with cable ducting fitted to the ceiling as well along the corners and down to each JBL Control 1 surround speaker.

Well here’s what I’ve been up to in the last 2 hours plus!

I had to remove the existing height surround one by one.

Then fit the mounting bracket to the ceiling with x4 screws that I hope bit into the wood that is behind it.

I must say it took 36 minutes alone to fit just x1 JBL Control to the ceiling, god I hope this holds, the site of it makes my skin crawl.

Anyway fitting it was scary for me as I hate heights, getting the (mould nut) was little orchard to attach due to the angle I was in. A small hole is fitted around the (mould nut) with where a pole can be fitted and thus turning it around to tighten it up is made easy.

Step by step I attached the parts to the JBL Control 1 for height surround installation.

http://forum.ecoustics.com/bbs/messages/3/309612.jpg

http://forum.ecoustics.com/bbs/messages/3/309613.jpg

http://forum.ecoustics.com/bbs/messages/3/309614.jpg

Getting close and now wow, the sight of it make me feel dizzy when looking at the picture. Well I said I was going to install height surrounds via a matching array of JBL Control 1 and now that is a reality it’s possible and there it is.

http://forum.ecoustics.com/bbs/messages/3/309615.jpg

Well I’ve have had a 30 minute break it’s back to work for the next JBL Control 1, which is going to present a tighter difficulty as you will see from the pictures in the next post in the next hour or so.
http://forum.ecoustics.com/bbs/messages/3/309616.jpg

http://forum.ecoustics.com/bbs/messages/3/309617.jpg

http://forum.ecoustics.com/bbs/messages/3/309618.jpg

http://forum.ecoustics.com/bbs/messages/3/309619.jpg

[JBL 4645]

At present I’m running the height surround with just x1 JBL Control 1 in position it sounds awesome with Superman Returns chapters 10 though to 12 startlingly realistic truly breathtaking!

Heavens above what this will finally sound like with x10 JBL Control 1 for the height surrounds, because at the moment it’s butting a huge smile on my face that goes from one side to the other and I haven’t stopped smiling anyway back to work now this is going to be awesome.

Height surrounds is the word.:applaud: :)
:dj-party:

[JBL 4645]

Well so far so good, no awesome is the word and only x8 more JBL Control 1 for the height surrounds to go now.

All I have to do at present is re-calibrate the surrounds centre back sides and height surrounds. I’ll start off with the heights then move over to the centre back and then finally calibrate the sidewall surrounds

Superman Returns is totally surrounding me and this is just with the four-channel JBL surround array truly awesome, wow this like being at the Empire Leicester square really it’s just too damn exciting here.

http://forum.ecoustics.com/bbs/messages/3/309656.jpg

http://forum.ecoustics.com/bbs/messages/3/309657.jpg

With airplane sequence in chapters 10 though to 12 where wind and music and with Superman’s speed racing against incredible odds looking upwards and from side to side and back as well it was a mad scene that was delivered with precision.

http://forum.ecoustics.com/bbs/messages/3/309658.jpg

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[JBL 4645]

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This angle was kinder tight to get as well as the tightening up of the (mould nut).

Wow during chapter 35 where Superman throws out one mighty piece of rock the levels on the four-channel array JBL Control 1 surrounds really heightens the scene with the choir and has his body hits the ground a very soft boom reverbs around the room.

Star Wars episode 3 Revenge of the Sith is around we to the side of me and above me does this get any better.
:applaud:

[Guido]

You're a JBL crazy person :applaud:

I recommend a new lamp and the use of some cable channels also ;)

[JBL 4645]

Guido

LOL

Yes hmm the light is a bit retro and ordinary, but installing ceiling lights would be far more complicated because for the wiring.

Has for being crazy, yes I am JBL nuts I’m crazy for it simply because the name is legendry James B. Lansing…
http://www.musicconnection.de/bilder/technik/James-B-Lansing.jpg


I need to test the timbre matching out on the loudspeakers now with a test tone that I will use from the THX audio set-up. There is a basic narrow band pink noise signal that is used to test the surrounds with (in-phase and out-off-phase signals).

The in-phase signal will send pink noise to the centre back, while the out-off-phase signal will send pink noise to the height surrounds.

Hence the decoder is looking for an anti-phase signal. There is also the standard test signal that cycles pink noise from (left side surround centre back surround height surround and right side surround.)

Plus there is a wideband pink noise signal or a dts set-up disc that is use for aligning the sound system for optimum sound performance, where I use track 14 (all channels pink noise) and via turn off different channels in the sound system where I can monitor the signal via SPL db metre or RTA, at the listening position or depending on where the microphone is placed in the room.

One other test that shows up well is, (rain effects) I have quite a few films that have (split-surrounds) one such title Psycho 98 the remake has some excellent rain effects during Marion’s travel along the highway at night very cool. The rain from the previous loudspeakers that I used for the (height surrounds) Ariston MSX-07 Mirro Monitors, weren’t all that good.

But the JBL Control 1 that I installed to the ceiling last night did a fantastic job in performance. Some of the bass was vibration the floor when all the other channels where turned off! Where I only had the x2 JBL height surrounds playing during chapters 10 and 12, as the plane draws nearer and nearer to the ground the reverberation on the heights was enveloping.

The more I add the less I will play it at, I will equaliser the parts that make the sound too bright. My aim is for a more, warmer sound approach with just the right amount mid range and highs.

[JBL 4645]

http://www.thejudyroom.com/newsletter/pics/oz1.gif
"Follow the yellow brick road".

Lead out to lead in etc, etc.

RCA left and right front stereo outputs from the Kenwood KRF-X9050D THX select goes to an audio limiter then outputs to the Yamaha DSR-70 pro it then outputs from the left and right stereo where it goes to one EQ than of to 1x Marantz 1050 for the left and right JBL control 5.

Centre channel out from the Kenwood KRF-X9050D THX select goes to an audio limiter than outputs to the Yamaha DSP-100 where I use one of the inputs for a special front channel effect of blending two into one that is sent to either the JBL control 5 or two separate loudspeakers one that would be placed overhead of the JBL control 5.

Anyway the centre output then passes t x1 EQ than outputs to x1 Marantz 1050.

A second output from the Yamaha DSR-70 pro, the centre output where I can split the signal from left and right making it less in loudness as one part of the audio signal over to JBL control 5 centre channel via the use of the Yamaha DSP-100 where I use the other input and a single monaural output from that processor which acts as a pre amp in a why is set to full output on the fader.

The Yamaha DSR-70 and DSP-100 both have a low pass output that is sent to the audio mixer channels 1 for main 2 for centre 3 is used from the Pioneer VSP-200 low pass output and 6 is used for LFE.1.

All the faders are set to output the level of sub bass extension and LFE.1 with pan pots sent to full left hand side on channels 1 2 3 where the pan pot for right is sent set to full right hand side. There are two stereo outputs from the mixer and please don’t confuse this with (stereo sub bass). The Eltax R-12 A handles all the sub bass extension for the three-screen and surrounds, where the JBL 4645 handles only the LFE.1.

Surround outputs from the Kenwood KRF-X9050D THX select goes to the Pioneer VSP-200 where it has a built in amplifier for surround matrix this is used for JBL control 1 height surrounds the centre output is used for centre back for the two middle row JBL control 1.

The left and right stereo output from the Pioneer VSP-200 goes to x1 EQ then goes on to x1 Marantz 1030 where speaker A runs the sidewall JBL control 1 and speaker B runs the two outer rear stereo surrounds. I use A&B for Dolby stereo films or the odd few films with split-surrounds.

When in Dolby mode on the Pioneer VSP-200 it will engage the centre back and overhead surrounds when in bypass it will only run the sidewall JBL control 1 unless I switch on B where six JBL control1 will be running.

I think that covers it and who knows what I might add on tomorrow, its all in the Dolby mix.

http://i174.photobucket.com/albums/w118/Brainstorm3417/IMAG0026.jpg

Just decide to add the extra JBL control 5, I’d still need to get the extra amplification x2 matching Dolby pro-logic decoders a few more equalizers and bingo I’d can enjoy special event films like...

Indiana Jones and the Temple of Doom
Indiana Jones and the Last Crusade
Always
Close Encounters of the Third Kind
West Side Story
Alien
2001: A Space Odyssey first edition DVD or laserdisc (not the reissue DVD)
Terminator 2 Judgement Day
Terminator 3
The Abyss
South Pacific
The King and I
Casper
Willow
My Fair Lady
Lawrence of Arabia
Hook
Jurassic Park
The Sound of Music
Titanic
U-571
Spiderman
Spiderman 2
Star Wars

Oh so many its all good stuff. :p

[Titanium Dome]

Dude, that's quite a project. That might just be the largest private collection of Control 1 speakers in the UK or even Europe.

Do you have any plans for room treatments?

[JBL 4645]

Titanium Dome

Thanks, I have no doubt it is it might be small but it surely kicks in a small room that’s the surround array and it’s still incomplete I need a few more for the sidewalls and a few for the overheard, one step at a time.

The answer about treatment keeps coming by most days over on the Audioholics, thou some feel something simple like drapes is easy but it won’t do too much it’s a sidewalls that are the problem the window side needs blocking up well at least to where the side window opens otherwise summertime will be sweltering inside the room!


I need to fix 1x1 timber a few layers to the inside of the window area and then fix some plasterboard up there job done. This will allow me to attach diffusers to the right side and this will be mirrored on the other sidewall.

But until I get my act together and get a few power tools nothing too costly or I could borrow a few for a week or two if I where to ask my dad. But I hate drills, but that’s why I have ear plugs.

[JBL 4645]

http://img.tesco.com/pi/entertainment/DVD/LB/731059_DV_L_B.jpghttp://img.tesco.com/pi/entertainment/DVD/LF/731059_DV_L_F.jpg

Just rented “The Sentinel” there’s a mole inside the (Secret Service) but who is it?

The films look was cross between In the Line of Fire and 24 that’s my way of putting and I liked it great escapism for 1hour 43minites.

Sharpness and detail of picture was uninterrupted in the scope format colours where rich and textured blacks showed up bold and solid in the darker moments.

Sound was punchy enough thou it wasn’t the type of bass that I had experienced on Poseidon last year with levels reaching as high as 120dbc The Sentinel was a different Dolby mix with some exceptional good surround moments that worked well with centre back with voice panning during the polygraph test and voices over the radios.

LFE.1 was used sparingly it bass was mostly extended via sub bass extension that was deep where gunshots could be felt when impacting into objects.

Overall I thoroughly enjoined throughout.

Film 8/10
Picture 10/10
Sound 10/10

[JBL 4645]

The new JBL gto6506 bass mid drivers that I installed into the JBL Control 5 enclosures look like they have paid off with Spiderman 2:applaud: with deeper tighter low end support over the three-screen. During chapter 46 Doc Ock fires up the machine that was felt deeply in the middle of the room without any strain even at 0db THX reference level.

Granted the audio limiters are also taming the dynamic range as well making for a more user-friendly home cinema experience.

http://i174.photobucket.com/albums/w118/Brainstorm3417/IMAG0002-4.jpg

[JBL 4645]

This afternoon whilst playing Titanic and towards the end where Rose is being held under the water by a passenger the low end of water that surrounds you creates this fear but what on earth was that buzzing sound?

After turning off the side surrounds and disconcerting the centre back I monitored the height surrounds carefully, I knew there couldn’t possibly be major fault with them as there hardly ever used. So I decided to take down the one that was buzzing, I checked the bass mid by pushing gently down on the cone it and it was fine, still it produced this buzzing sound on the same sequence in the film?

So I opened her up and looked around her carefully until I noticed some clear sticky glue that was attached between the cone and the outer far part of the enclosure.

Unattached the glue, played the same sequence over again and it was 100% now all I have to do is place her back up and I hate heights I’m not easy with heights oh well.

[JBL 4645]

At the moment I’m having my pc upgraded so I can’t use my photo bucket, no matter here’s the view from the floor looking upwards.

[JBL 4645]

Yesterday I was thinking about adding another pair of JBL Control 1 to the ceiling or the possibly the sidewalls, but they need to be securely located where some of the bass is weak the corners at the rear are showing slight signs of weakness and just a few inches from the corner might reinforce the sound of the U.S.S. Enterprise in Star Trek II the Wrath of Khan, as the backgrounds carry a nice low end that really surrounds you in atmosphere.

Anyway I’ll see how the rest of the day turns out as I’m expecting the new amplifier Alesis AR300 to turn up as it was sent out yesterday instead of the day before.

Also I performed a wideband pink noise test using the dts music and demonstration disc tracks 11 and 12 for left and right where there was a good loudness of tone when the voice announced the channel that was to about to play.

I use track 14 all channels and with the fronts turned off as well as the sidewall surrounds and LFE.1 sub bass. I switch on the Pro-Logic on the Pioneer VSP-200 and check the SPL db level and RTA of the centre back surround.

I didn’t check the height surrounds yesterday, but if anyone feels I should add the next pair of JBL Control 1 to the ceiling for height surrounds please say.

[JBL 4645]

Well seeing I have such a complex home cinema set-up with lots of additional Dolby pro-logic decoders doing different things when engaged with Dolby 5.1 or dts 5.1 source signals, where I can use one decoder set-up the centre back and height surround overhead.

Well since the installing of the Alesis RA300 I’ve just realized I can get a little more temporary flexibly control from the height surrounds overhead channel.

So while the Pioneer VSP-200 has been processing the split-surround signals for the past, and thou it hasn’t got a pre output for matrix surround which is only supplied via the two monaural outputs that would go direct to the loudspeakers, hence its amplified.

The plan is to use the Yamaha DSR-70 which supports pre-outputs as its only a processor only. Now with a little simple re-plugging and swapping RCA phone leads and loudspeaker cables around as well as using an EQ for the height surrounds to adjust any small differences in frequency response as well as the range of the frequency, this should only take me around 30 minutes to do.

Plus additional time for setting up the dts demonstration disc track 14 all channels and re-calibrating the levels of the fronts left and rights as the Yamaha DSR-70 inputs are being sent from the Kenwood KRF-X9050D THX, outputs from the Yamaha DSR-70 then pass though the DCX2490 loudspeaker management system.

So the level on the Yamaha DSR-70 fader has to be matched to that of the Pioneer VSP-200, piece of that cake mate easy. Once all done I’ll set-up the SPL db and RTA and do a few simple tests and then tidy up.

Next would be to test a few films out with the JBL Control 1 surround array on only, check that the levels are alright in each channel as I can turn on any of the 4 surround channels.

Left sidewall array
Right sidewall array
Centre back wall array
Height overhead array

Or play all at the same time.:applaud:

Anyway let’s get to work.

[JBL 4645]

Well seeing I have such a complex home cinema set-up with lots of additional Dolby pro-logic decoders doing different things when engaged with Dolby 5.1 or dts 5.1 source signals, where I can use one decoder set-up the centre back and height surround overhead.

Well since the installing of the Alesis RA300 I’ve just realized I can get a little more temporary flexibly control from the height surrounds overhead channel.

So while the Pioneer VSP-200 has been processing the split-surround signals for the past, and thou it hasn’t got a pre output for matrix surround which is only supplied via the two monaural outputs that would go direct to the loudspeakers, hence its amplified.

The plan is to use the Yamaha DSR-70 which supports pre-outputs as its only a processor only. Now with a little simple re-plugging and swapping RCA phone leads and loudspeaker cables around as well as using an EQ for the height surrounds to adjust any small differences in frequency response as well as the range of the frequency, this should only take me around 30 minutes to do.

Plus additional time for setting up the dts demonstration disc track 14 all channels and re-calibrating the levels of the fronts left and rights as the Yamaha DSR-70 inputs are being sent from the Kenwood KRF-X9050D THX, outputs from the Yamaha DSR-70 then pass though the DCX2490 loudspeaker management system.

So the level on the Yamaha DSR-70 fader has to be matched to that of the Pioneer VSP-200, piece of that cake mate easy. Once all done I’ll set-up the SPL db and RTA and do a few simple tests and then tidy up.

Next would be to test a few films out with the JBL Control 1 surround array on only, check that the levels are alright in each channel as I can turn on any of the 4 surround channels.

Left sidewall array
Right sidewall array
Centre back wall array
Height overhead array

Or play all at the same time.

Anyway let’s get to work.

And since the time I typed out the above text I’ve been re-plugging!

Well this didn’t take me too long to accomplish the rather complex task I think I had re-plugged and tested in around 40 minutes, seem like I have lost the spirit of it yet.

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A lot of re-plugging going on back here!
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Slight bit a quick re-plugging of the sub bass extension and LFE.1, although LFE.1 needn’t be changed around. The LFE.1 input is the RAC lead on the far right of the mixers 6 inputs. What I had to do was just reassign the front left and right summed sub bass signal centre front sub bass and split-surround sub bass signal easy.

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[JBL 4645]

Calibrating the main left and right levels at the same time as I noted the differences before changing everything around, there was no hitches what so ever. Just a lot of feeling around, knowing which RCA plug to plug in where and where its output would travel too.

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Now it’s time for some original Dolby stereo mix from the original “Star Trek the Motion Picture” 1979 laserdisc to DVD-RW for my own personal use only!

Yeah that THX JBL experience lots of low end sub bass extension, just like the EMPIRE Leicester square screen #1 yeah make it loud!:applaud:

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[JBL 4645]

Just reconfigured the wiring on the JBL Control 1 over to series for the sidewall surrounds and bumped up the output on the Marartz 1050, which will soon be replaced by the Alesis RA300 later in the summertime.

The results where far better as I noticed the other day a slight brief popping or scratchy sound, during Falcon and Saturn V rocket flybys! Now there’s no problems at all. I guess I missed a step when wiring the JBL Control 1 up last summertime, well its fixed now and they can play just a bit more louder.

Still the safety margin of the audio limiter is in the ON mode for the surrounds to prevent the levels from going into clip! But it was the way I wired the surrounds on the sidewalls. Only a few more surround’s to reconfigure rear wall that is placed in the centre part of the room. Also the height surrounds and that is going to be pig, because the way there fitted and since I don’t like standing on stools of ladders its going to be a little tricky, but doable.

http://i174.photobucket.com/albums/w118/Brainstorm3417/Apollo13dtsTHXlaserdiscfront.jpg


Apollo 13 dts THX laserdisc that was tested this afternoon had the CM closing in around me and Mission Control sounding a little more open or spacious, you can hear the air conditioning system as well voices from what sounds like the real mission transcripts in the surrounds on chapter 19.

[JBL 4645]

Well I’m kinder getting into the DIE HARD theme as its not to far away now from blowing audiences though the back wall of the cinema again!

This was a wild sequence one of many I must say that jolted with a slight bump in the centre channel as the glass shutters under the hail of machine gunfire, and drops to the office floor. Not bad for sounding for the ole JBL Control 5.

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Bass is produced over the three-screen with lots of directional cues that ping pong side to side effortlessly without putting enormous strain on the ears, db level was 85dbA on peak most of the time, bass was around 92dbC.

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Jesus Christ! Yeah, being shot at from two directions and being slightly confused glass is tinkering all around! it must be noted that DIE HARD has (monaural surrounds) only not split-surrounds.

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Debris falling around just moments after the roof was blow to utter smithereens as there’s a huge KANOOM on the (monaural surrounds) with deep bass. The surrounds that where turned on due DIE HARD where sidewalls and left and right half on the back wall for that cinema feeling!

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Note: audio mixer all the low pass sub bass outputs pass though here including LFE.1.
The first line, line 1 has the left and right sub bass which is summed and then outputted via the single line out.
Line 2 has the centre low pass sub bass which is then outputted via the single line out.
Line 3 has the low pass sub bass which is summed from the surrounds or split-surrounds its then outputted via the single line out.

Line 5 has the LFE.1 passing into the mixer all the channels are balanced with each line inputs as well monitoring the level via the VU meter to make sure the level never exceeds 0dbvu other than that the level of the sub bass amplifier has been set for a comfortable room level with all the impact. The main fader level on the mixer can be adjusted or I can trim a few db off each channel if it’s too overwhelming especially the LFE.1 which can be very unpredictable, not in this home cinema!

Note: the DSR-70 Here I can control the level of the surrounds output and with its main fader level controlling sidewall surrounds and smaller trim levels for centre which controls the centre back and rear which controls the height surrounds. Pre sub bass out is located on the rear.

Note: the VSP-200 this plugged into the outputs from the KRF-X9050D THX its controlling the level of fronts and with the push of the button into Dolby Pro-Logic it will divide the centre phantom from left and right and send it to the centre channel while the remaining centre channel that is play directly from the KRF-X9050D THX which passes into the DSP-100.

Note: the KRF-X9050D THX this is where the main decoding takes place from Mono stereo Dolby stereo and Pro-Logic II Dolby digital 5.1 and dts 5.1. Main fader is also controlled from the KRF-X9050D THX. Inputs as follows.

Video 1 is for analogue input for Hi-Fi VCR which I’ll talk more about later.
Video 2 is for SONY DVP-S336 DVD
Video 3 is for Pioneer CLD 1750 laserdisc player
DVD is for Pioneer DV-525 DVD
Aux input is for Cello DR-810 DVD-RW

Pioneer CLD 2950 laserdisc player is off line at the moment.

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Ferguson Video star Hi-Fi stereo VCR, now if you can see it here in this picture here is being used as an audio limiter, that’s right I was tight for budget at the time and since I don’t use the Hi-Fi stereo VCR that much I thought it would be a good opportunity to use the audio limiter to not only protect the output signal from the surrounds from going into clip! It could sever as a good partnership with surrounds and it performs quite well.

So I can not only take the levels up on the surrounds via the DSR-70 it would make softer scenes sound fantastically involving than before, scenes like in Star Trek Nemesis really surround in the softer moments and the louder ones tamed without any distraction.

This was also the case with DIE HARD so get re-plugging if you really what to enjoy films at home!

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Note: the optional active crossover this discounted for the time being, but I’m sure I’ll figure out new role for it to play within the sound system or something other. Its crossover points are fixed at from 20Hz to 500Hz and from 500Hz to 20Khz, the levels are variable as well.

Note: I have several EQ still in line that will be eventually changed over to multiples of DEQ2496 for the sound chain with 1/3 octave EQ.

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Note: the Marartz 1050 x1 this powers the centre channel and the centre front JBL Control 5 while centre back surround powers the JBL Control 1 x2.

Note: Alesis RA300, it starts here this summertime with a complete refurbishment of the amplification with newer and higher powered amplifiers, when I reach x3 Alesis RA300 within a few weeks I’ll consider the change over to the fully active crossover mode and let the DCX2496 take care of all the safety limits of the front loudspeakers. Its presently set-up to drive the left and right JBL Control 5 in full band mode via the DCX2496.

Note: Marartz 1050 x2 this is powering the sidewall surrounds in A mode which drives the x2 JBL Control 1 there wired in series and the amp is boosted just a little bit more for dynamic DIE HARD explosions! B mode controls the back half JBL Control 1 which is placed on the outer side of the centre back surrounds which are placed in the centre half of the room.

While in split-surround mode or monaural surrounds like in DIE HARD both A and B are turned ON to really surround the room with sonic impact.

Note: Marartz 1030 x1 this only powers the height surround with x2 JBL Control 1 placed up high, its performs best with split-surrounds its signal comes from the DSR-70 which passes though an EQ same goes for the centre back and the sidewall surrounds with there own EQ as well as master EQ for input only that passes though to the DSR-70 main inputs.

Note: you can see the sub bass that is parked on top of the JBL 4645 that’s been discounted and I’ve used its onboard power amplifier to drive the JBL 4645. The 12” driver that fits into this unit Eltax A R-12 is tucked away safely.

Well I hope this has answered a few questions and it’s about to get a whole lot better this year, it starts here.

[JBL 4645]

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[JBL 4645]

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Bought the new (Mel Gibson) film today and what a cracking Dolby film it had on the JBL set-up I was surprised by its openness of the jungle sounds and thou this has been attempted before in other films, it wasn’t a bad Dolby mix dialogue or the original linguistic of the natives made this all seem realistic and thou subtitles are provided to help the viewer follow the story it was bad. Audio commentary by (Mel Gibson) and (Farhad Safina) and "Gibson" is out of control, just listening to the guy near the end credits “SDDS sucks” and “colour by Deluxe” the guy is nuts!

LFE.1 was used subtlety in the film while most of the low end is either covered by the LCR surrounds and with deep waterfall sounds it adds a little more deeper extension without mudding or colourizing the sound. So make sure you’re sub bass extension is calibrated correctly and the LFE.1 channel sub bass or array isn’t going to overpower the mix!


One other thing a few nights back I set the levels of the matching JBL control 5 LCR with the centre channel EQ from centre channel first at output on B channel on the DCX2496.

3.04 KHz -0.7db
4.02 KHz -1.4db
5.08 KHz -1.7db
6.03 KHz -0.9db
8.14 KHz -0.8db

I noted the SPL level and frequency response via the RCA phone that was connected from the SPL to the RTA display Technics SH-8055 and all looked well with a flat line, SPL was set to db A weighting for the high frequency test with wideband pink noise.

Next I played some simple dialogue in down mix mode, this is where its all sent to the left and right channels only! Noted the difference and then switched back to Dolby 5.1 up mix mode! Noted the difference was rather high on the left and right and made some simple adjustments to the left and right with a -10db on left and right that is set on the DCX2496.

While this started to sound ok at first I did however notice the left and right was a bit bright sounding so I added some EQ on left and right at.

1.60 KHz -0.5db
2.03 KHz -0.1db
3.18 KHz -0.9db
4.02 KHz -0.9db
5.08 KHz -1.7db
6.03KHz -0.9db
8.14 KHz -0.9db
9.06 KHz -4.0db

100Hz +0.3db
161Hz -0.1db

Thou these settings might be of some use with someone having the same unit I would say the settings might be useless, well its all about trail and error, and thou its less louder now and with greater clearness of the centre channel from music dialogue and sound effects that are placed in the centre channel and don’t forget the centre channel is delayed it was a higher number the week before but for now its at.
2.35m
6.84m/s

Phase is also been adjusted to compensate for the three-screen when bass is sent to all channels, so I played a few openings from a few films “Catwoman” during the first few moments of the opening titles there’s a nice deep bass note that’s sent to LCR and LFE.1 as well, but I was the centre channel that needed some attention because now it was out of phase with the rest of the three-screen.

Setting the phase by going step by step though the different settings, I finally settled with 180° which placed the three-screen channel in-phase and when set with the LFE.1 it adds greater depth not to mention sub bass extension.

[JBL 4645]

Note wit this screen capture, the scene where Obi-Wan walks calmly towards Darth Maul, and where Maul, uses the force to throw box towards the control panel that opens the doors. The sound is heard in the centre channel as well as on the right channel, with the delay setting on the centre channel where it simply makes it easier to hear the right channel thus creating a smoother front stage as well as keeping the centre channel information loud and clear.

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Even when Darth Maul, inhales you can hear the subtlety of it. Oh yes I like the new DCX2496 and the new matching amplifies, truly indispensable.:p

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[JBL 4645]

Take a few simple (breezeblocks) and with some plastic of other placed underneath them prevent them from making a mess then place the sub bass on them. If the sub has feet its okay as this will not scratch the surface. If it doesn’t have feet place some carpet on them followed by the sub bass.

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This was one of the things I tired out since late of last week and thou it was kinder successful at reducing vibrations it wasn’t near enough when I got around to playing Return of the Jedi yesterday afternoon.

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Chapter 13 The Emperors Arrival all the deep tympani bass was kinder lost due to the placement as I had only played a few films since and I guess some of them didn’t have bass between 20 and 40Hz that was deep enough. So after use the SW-Re-mix function on the Kenwood KR-F9050D THX select and sent the screen channel bass to the JBL 4645 where it sounded outstanding with lots of drama in chapter 13 when the Emperor arrives at the new Death Star.

Now all I had to do was re-position it which took around 8 minutes played the same scene over again and wow that was better and no vibration that is originally within 2” from the floor surface this produced enormous rattling problems with the floorboards where I forced to reduce the volume be many db, and as you guessed it this would reduce the impact emotional drama of the mix.

When Han Solo gets punched after carelessly steeping on a twig SNAP! The stormtrooper gives him one heck of smack that felt better than before yes a few (breezeblocks) can make a bit of difference.

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[JBL 4645]

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Had this rather interesting conversation with mate down under that says this technique has been down once before back in 1990 and much to my surprise I think it’s a wonder solution to tighten up the sub bass and give it a fast attack.

So here’s the deal I’ll grab a few more breezeblocks in a jiffy for an LFE.1 experiment in the morning as its too late here right now! I’ll need x3 for the task one for each end and one for the middle.

I won’t just go right into it I’d first test it out without the (breezeblocks) make notes of it, the way it feels! SPL db notes would be a little pointless as the unit will only be off the floor be as much as 4” but still I’ll take SPL db readings to use as guide reference.

Also I’ll plug the lead into the SPL db metres output and take RTA readings before and after.

While it may have improved the sub bass extension with tighter low end response and faster attack as that is what I noticed and I’ve had the darn thing in that position time and time again with the same thing having to turn it down slightly due to the sound waves vibrating the floorboards directly beneath the sub bass driver. That’s it beneath “What Lies Beneath” I haven’t tried that one out that’s got awesome low end that is supported over the range of channels mostly the threes-screen like when Norman puts his wife in the bathtub and the water level is rising above the overflow pipe with deep low end!

One other minor change I’d have to make is to the height of the JBL Control 5 right channel it’s going to up by 4” and I’d have to figurer a way of getting it within a few millimetres.

I kinder feel like Indiana Jones “Raiders of the Lost Breezeblocks.”

Oh yeah I’ll try that scene out with the bolder rolling down the cave.

When I get around to building horizontal platform for the front loudspeakers which would take care of placement overnight and a lot more.

Okay time to garb a few breezeblocks before someone else garbs.

Well that didn’t take long and yes I encountered spiders but no snakes,:D slugs yes and one centipede and I hate bugs.

Well before bring those breezeblocks in I cleaned them down with broomstick and its just struck me, I’m going to need some type of carpet or other to place over or around the breezeblocks before I start moving the JBL 4645 on top them as I don’t what to damage the surface!

[JBL 4645]

Now there’s term I like to call “crazy bass” that hits the ear in way that you kinder flitch to one side quickly this was more recognized when I saw Titanic at the local ABC and via the -auditoriums JBL 4675-A screen array. When “Jack and Fabrizio” are running though the crowded docklands the bass rhythm was tapping my ear drum with pleasurable and yet pleasing situation that was kind of ticklish.

Now try that one at home but you’ll need matching fronts and a little phasing of one of the channels left and right to achieve this. The music is one the left and right fronts with subtle instatement on the split-surrounds the centre channel carries dialogue and effects during this sequence.

The first bass note starts around here with slow rhythm that picks up the beat in the next shot it taps the ear somewhere between the 40Hz and 60Hz region.

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[JBL 4645]

Well I now have some cardboard and I can go ahead with the project sometime today, it was easy after spotting the (ISS) passing overheard only 10 minutes ago heading (southeast) out towards Europe and after showing a girl at the (Co-Op) I then asked for some cardboard and look what I got yes this is more than enough.:)

http://i174.photobucket.com/albums/w118/Brainstorm3417/Picture056.jpg

[JBL 4645]

Okay here’s the order of what I’m going to do today.

First make a sandwich and do secondary brainstorming before I tackle the project. I’ll need to check out at least a few films on DVD and laserdisc as it is presently, then start moving the JBL control 5, right channel out of the way and then move the JBL 4645 to the middle of the room where I’d then start cutting the cardboard to size for installation on the floor making sure to undo the cable.

Next place the breezeblocks into position and then cover the tops with cardboard to prevent the JBL 4645 getting scratched.

Next is to move the JBL 4645 into position and tilt it back slightly so that I can get the back end on the breezeblock supports. Slide it up into position connect the cable to the JBL 4645 and then place the JBL control 5 back into place, only I’d have a new problem and that is the height? I’d have to make some adjustments to get it within the same height as before and that will take an extra bit of time and thinking, besides I’ve been in this situation before, no worries.

Once its all done and ready to go its all trail and error to see if the breezeblocks make any or differences to the JBL 4645 not that I’ve had any difficulties with it in that location and unlike the other sub where the driver is facing downwards towards the floor within 2” the JBL 18” sub bass driver is mere 4” away from the floor or it may sound better being clear by 4” or it may sound the same worse but I hardly doubt worse. So that’s the plan I have drawn out I’ll get a little kip at the moment and then processed with the experiment in a few hours time.

[JBL 4645]

Oh well I’m back and I’m tired after humping that huge monolith of 2001 odyssey JBL 4645 sub onto those breezeblocks, well it was easy the cardboard made it slide onto them and its kinder added a slight impact with X-Men II The Last Stand when Jean uses her powers to suspend objects until it all came down to thundering SLAM!

http://i174.photobucket.com/albums/w118/Brainstorm3417/Picture060.jpg

http://i174.photobucket.com/albums/w118/Brainstorm3417/X-MenIILFE.1test1.jpg
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I believe the frequency response is down to 25Hz on X-Men II when that house slams into the ground as well as most part of film. It hit at 112dbc in the middle and that was more than enough comfortable without being overwhelming.

http://i174.photobucket.com/albums/w118/Brainstorm3417/JBL4645LFE.1subbassbreezeblocktest2.jpg

At the moment I’ve got summer hit from 1999 The Mummy playing chapter 5 when “Rick” busts in to save “Evelyn” his voice his heard from the left sidewall surround array and partly the front its then accompanied by some crazy LFE.1 pounding on my body.

[Ian Mackenzie]

Just a thought,

Inverting the 4645 so the woofer is on top would make a difference but you may not have spece for equipment that sits upon the enclsosure.

However, I would imagine the the active xover would have ample parametric eq to modify the response accordingly.

[JBL 4645]

I know what you mean by turning it upside-down, I’ve tried that before and it looks very imposing in this room very imposing.

I don’t have any other active crossover filters leftover that would be any good for filter the unit and yes it does generate some hiss when the Kenwood KRF-9050D THX select volume is turned above -8db when playing a film in digital if there’s no LFE.1 happening and the volume is above -8db hiss is produced! I’m not sure if this is a universal issue or other but it only needs a very good passive crossover filter placed on the sub at 80Hz -18db octave or best I’ll have to wait until I can afford another DCX2496.

Also there’s a slight buzzing sound which I’ve minimized by grounding a secondary wire to the Alesis RA300 and used one of the spare EQ to filter the hiss by cutting off all the high range filters, and its kinder hard to tell if its got a buzzing sound or not.

I’ll wait until I can install another DCX2496 that would be the ticket.

Other than the breezeblock idea it seems to be working okay, just need Alesis RA500 in bridge mono mode to run it with sufficient power I don’t need the whole hog in a small room good heavens just enough for headroom.

Anyway please excuse me I’m rather tired and I’m not quite feeling myself this morning, must be the weather.:D

[Ian Mackenzie]

JBL 4645,

Thanks for posting.

I certainly admire you for trying all the options.

Ian

[JBL 4645]

Ian

Well I’ve even placed it facing down, that is the sub bass driver facing the floor and does it ROCK! The only thing I don’t like about that idea is the thing sticks out to much in the room by as much as 8” while in the normal position it only takes up around 18” in depth.

[northwood]

http://mumayi1.999kb.com/pic/2007-08-02/e2e803n0tzwv63yu7xow.jpg

Just took this,give it to u as a reward:D

[JBL 4645]

http://mumayi1.999kb.com/pic/2007-08-02/e2e803n0tzwv63yu7xow.jpg

Just took this,give it to u as a reward:D


Long, you ole bugger how been, haven’t seen you around here in a few months, I see you still take the pictures and yes, I like oriental girls they are drop dead sexy.:smsex:

[JBL 4645]

I recently placed the two additional JBL control 5 at the rear as pictured here. The differences it makes but there only receiving the low bass. What I did was, I placed a Y lead plug connector on the output of the Pioneer VSP-200 that is presently running the centre back surrounds height surrounds while the pre-outputs are being feed to the Marantz 1030 for the sidewall surrounds.

The low pass output is being divided in two ways one output drives the Marantz 1050 which powers the two JBL control 5 at the back corners. The other lead goes to the audio mixer which is then feed to the Eltax A-12 R to take the low end down further.

The two are perfectly seamless and work very well with True Lies dts laserdisc where the terrorist jumps onto the back of a Harrier-Jet.

[JBL 4645]

Custom array was the word I was looking for last night the only disconcerting thing is the colour of the JBL Control 1 as they look a bit out of place, but the performance with this afternoons trail a loader levels did wonders within the technical restraints went even louder yet keeping the harshness in the box.

http://img.tesco.com/pi/entertainment/DVD/LB/418766_DV_L_B.jpghttp://img.tesco.com/pi/entertainment/DVD/LF/418766_DV_L_F.jpg


http://i174.photobucket.com/albums/w118/Brainstorm3417/Afewgoodmenbutyouhathtoaskmenicely.jpg

“But you have to ask me nicely.”
Col. Nathan R. Jessep A Few Good Men (1992)

The stunning clarity and brut force of the dialogue mix on this film was crystal clear if not a little too realistic at times in terms of loudness and depth that was partly felt. Thou this is an old film by now some 15 years, (1992) it still holds up very well on region 2 DVD.

With peaks reaching close to around 90dbc during the last few moments of the court trial case where “Col. Nathan R. Jessep” played brilliantly by (Jack Nicholson) explodes in a rage of fury at “Lt. Daniel Kaffee” played by (Tom Cruise) where you could even hear a pin drop when everything drops to utter silence in the court room.

http://i174.photobucket.com/albums/w118/Brainstorm3417/Afewgoodmendidyouorderthecodered.jpg

http://i174.photobucket.com/albums/w118/Brainstorm3417/JBLthree-wayControl.jpg

http://i174.photobucket.com/albums/w118/Brainstorm3417/Afewgoodmenyougoddamnrightidid.jpg

http://i174.photobucket.com/albums/w118/Brainstorm3417/AfewgoodmenshockonKaffeesface.jpg

This is the appearance as it is now and was last night, what possessed me to do this I have no idea but it does sound far better than a few hours before I set-up like this and thou it was improved over the original passive crossover network. I’m extremely pleased to push the (loudspeaker management system) further JBL Control 5 LF 50Hz to 260Hz JBL Control 1 upper mid bass and HF from 277Hz to 20kHz.

I’ve noticed the differences or the control with the phase settings and polarity as well as delay settings seem more open and spacious. To take this one more step further would require another DCX2496. Well I’ve done a few nail sketch drawings to figure out how this would all rack up together as well as thinking beyond to see what ways or how I can improve with smaller loudspeakers in a small room with only a one extremely large one and one moderate size one.

I also gave the laserdisc a spin after the gripping conclusion between (Nicholson and Cruise) the sound pressures seamed almost transparent except the laserdisc has the edge on the audio PCM and thou the clarity in image is slightly weaker it was still very entertaining.

http://i174.photobucket.com/albums/w118/Brainstorm3417/AFewGoodMenlaserdsic.jpg

[JBL 4645]

Just picked up The Sentinel and 16 Blocks each for £7.00 that’s ASDA price! I saw the films several months back on rental and rather enjoyed the Dolby film mix so I’ll try them out later on the new active JBL three-way three-screen matching system to see how they perform second time around.

http://img.tesco.com/pi/entertainment/DVD/LF/731059_DV_L_F.jpghttp://img.tesco.com/pi/entertainment/DVD/LB/731059_DV_L_B.jpg

http://img.tesco.com/pi/entertainment/DVD/LF/705486_DV_L_F.jpg

[00Robin]

What about Farscape? Are any of ya's Scaper's there? Farscape on the Big Daddy's sound real nice...REAL nice.

[JBL 4645]

What about Farscape? Are any of ya's Scaper's there? Farscape on the Big Daddy's sound real nice...REAL nice.

Err looks like I need the (universal translator) to decode that one? Can you please translate that, I don’t talk rap.:D

http://images.wikia.com/memoryalpha/en/images/thumb/9/97/UniversalTranslator2267.jpg/180px-UniversalTranslator2267.jpg

[hjames]

Err looks like I need the (universal translator) to decode that one?
Can you please translate that, ...


Gak, not that tired old trible-ator - nah!
Farscape is about John Crichton, a great 'merican astronaut who got sucked through a wormhole and found himself on Moya, a giant, living ship.
Twas a GREAT series from a couple years back ... very innovative stuff - imaginative, not like the squeaky clean galaxies of the Kirk-unit or Janeway's crowd.
That trek stuff is just so ... sixties ...

[JBL 4645]

Gak, not that tired old trible-ator - nah!
Farscape is about John Crichton, a great 'merican astronaut who got sucked through a wormhole and found himself on Moya, a giant, living ship.
Twas a GREAT series from a couple years back ... very innovative stuff - imaginative, not like the squeaky clean galaxies of the Kirk-unit or Janeway's crowd.
That trek stuff is just so ... sixties ...

What! Huh! Boo! Hiss!:D

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/LaforgeIseehimcaptainFIRE.jpg

Okay so looks like I missed another science fiction TV show from a few years back then. Looks like it’s only done a few seasons like the original “STAR TREK” I guess that would make a come back one day soon in the future.:)

http://www.imdb.com/title/tt0187636/

[JBL 4645]

http://img.tesco.com/pi/entertainment/DVD/LB/625267_DV_L_B.jpghttp://img.tesco.com/pi/entertainment/DVD/LF/625267_DV_L_F.jpg

Rented a rather good film this evening called “Layer Cake” starring (Daniel Craig) and a good line of British actors in a rather violent gangster capper its full of twists and lots of double crossing.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/Layercake2.jpg

The sound mix was more up front with clear dialogue reproduction a little ADR heavy with (Daniel Craig’s) narration that opens the film with some funny lines some a little too strong to mention here. Occasional dialogue panning doors opening and closing deep LFE.1 that thumps out in the night club sequence or when “Morty” goes nuts in the “Regency café” was shocking yet funny at the same time. All the hard hitting punches smacking and kicking was happing right in my face without any strenuous distortion.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/Layercake1.jpg

Surrounds where playing back with centre back but was a little soft even thou the surrounds where boosted slightly even after I did a pink noise check before playing the film.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/Layercake3.jpg

[JBL 4645]

http://img.tesco.com/pi/entertainment/DVD/LB/300434_DV_L_B.jpghttp://img.tesco.com/pi/entertainment/DVD/LF/300434_DV_L_F.jpg

Well I couldn’t resist in running a very late night JBL THX showing of “Under Siege” (1992) I’m still impressed with the Dolby stereo 5.1, mix knocked my soaks off.

Split-surrounds use was played back with centre back surround and performed magical plenty of side surround usage with atmosphere sounds and directional voice sounds over intercoms practically when (Gary Busey) character “Cmdr. Krill” walks though the corridors there’s a panned sound slightly on the right front and alongside the right sidewall surrounds.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/UnderSiegeDolbystereoSR-Dclassic7.jpg

I made a few audio compensations via lowering the LCR while boosting the LF in LCR and boosting the HF in the centre channel kept the action playing while maintaining clear dialogue intelligibility, Foley with hand to hand combat was handled with comfortable ease as “Casey Ryback” played by (Steven Seagal) disposes each bad guy with perverted use of methods whether it be, explosives or cooking knifes.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/UnderSiegeDolbystereoSR-Dclassic3.jpg

LFE.1 supported by the JBL 4645 played without overwhelming nor, bringing too much attention to itself was impacting during the helicopter explosion.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/UnderSiegeDolbystereoSR-Dclassic5.jpg

[JBL 4645]

Just brought a few films for later on tonight, having heard the conventional Dolby stereo 4:2:4 mix of “Bram stoker's Dracula” (1992) on laserdisc it would be great to hear the difference between two. Also “Dante’s Peak” (1997) having originally owned the THX laserdisc once and the first edition region 2 DVD which I still have this edition first appeared on the (THX laserdisc signature collection) its also accompanied with dts film mix I’ll see later on which one has the edge, I need a little kip first.

http://img.tesco.com/pi/entertainment/DVD/LB/660712_DV_L_B.jpghttp://img.tesco.com/pi/entertainment/DVD/LF/660712_DV_L_F.jpg


http://img.tesco.com/pi/entertainment/DVD/LB/523678_DV_L_B.jpghttp://img.tesco.com/pi/entertainment/DVD/LF/523678_DV_L_F.jpg

[JBL 4645]

Just ordered though (Digital Village) a calibration microphone Behringer ECM8000 along with a 6 metre cable XLR, should be with me in the morning so I can use this to (auto celibate) the time arrival distances short long and polarity settings with the DCX2496.

£44.00 pounds isn’t too bad for price.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/ECM8000micrphone.jpg

[JBL 4645]

After delaying re-soldering a possible dry-joint on the (Technics SH-8058) and so, early this morning with the soldering iron nearby me ready to attack a little probable dry joint on one of the input terminals. I unscrewed all the side screws and screws that supported the PCB (printed circuit board) flipped the PCB over and looked it over with a magnifying glass, looking for hairline fractures moving the circuit pin connector with my finger to see it moved.

Well there was one pin that I was a little uncertain about so I decided to go ahead and warm up the soldering iron and fix the elusive humming problem that it was inducing.

It turned out to be a lucky success after I put the unit back together that’s all. I then used it for a screen bass left and right enchantment that outputs from the DCX2496 LF as well as working as monitor to see what’s happening at the bass screen channel low end.

The EQ is very broad in terms of full frequency spectrum, but seeing I have the screen bass on left centre and right channel’s set at 50Hz to 499Hz with a mixture of (Linkwitz-Riley and Besselworth) and where’s the (Technics SH-8058) barograph display function is from (63Hz 160Hz 400Hz 1KHz 2.5KHz 6.3KHz 16KHz) it’s a not a bad little EQ, soon to be replaced with matching 1/3 octave EQ.

[JBL 4645]

Well it finally turned up this morning, very pleased. I’ll do a thorough check out later in the day in the mean time I’m popping off to Winton high street.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/ECM80002.jpg

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/ECM80008.jpg

[JBL 4645]

Bugger me I forgot the Phantom Menace Power supply unit to power the ECM8000 bugger!

So I’ve just ordered though “digital village” uk a (Behringer TUBE ULTRAGAIN MIC100) should be with me on Friday.

£30.00 pounds.

Digital Village has one of the most relaxed calm custom services I’ve come across, nice friendly all round fast service. :applaud:
http://www.dv247.com/assets/products/9212_l.jpg

[JBL 4645]

Well it finely turned up and after reading though the pdf manual this morning to get a basic understanding of the MIC100. After switched on MIC100 and giving a few minutes to warm plugged in the ECM8000 and attached the other XLR lead to the MIC100 and plugged it into the Technics SH-8055 I soon noticed I had to reduce the noise floor.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/MIC1001.jpg

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/MIC1002.jpg

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/MIC1003.jpg

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/MIC1004.jpg


Once done I played some pink noise and monitored the centre channel first off. The response was pick up was far better than my other microphone after making a few adjustments to the left and right I resumed “Dragnet” (1987) that was playing last night but I got a little restless.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/Dragnet1.jpg

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/TechnicsSH-8055.jpg

The MIC100 is relatively easy to operate once you get used to its functions.

I’ll go a little further later this afternoon or early evening when things quieten down a little bit, I have the sub bass extension to look at and LFE.1 and surround arrays as well.

[Audiobeer]

WTF

P.S. The pic of the Young Lady is absolutely Beautiful Northwood.

[grumpy]

an example comparison of Earthworks S30 (M30) and a Behringer ECM8000
(only one example of each, but I thought someone might find this interesting).
Ignore the small variations... getting -exact- mic placement
vs the test source is tough. Levels have been normalized. If you assume the
S30 is flat in this bandwidth, then the ECM8000 response is what the plot
represents (deviation from flatness).

-grumpy

[JBL 4645]

grumpy

Not sure if I follow you but I do catch on. Are you say the mix is a bit high end on the high frequency response? And that it needs to be calibrated for an even more flatter frequency response.

So far I’ve gotten a bit of usage out of it the MIC100 is a little tricky I can see the level of noise being added on the RTA and keeping a nibble finger on the knobs so that it won’t distract me too much. After which I can do a pink noise check it’s a slight improvement over the other microphone that I’ve been using for the past 6 years.

I’ve done some crazy analyzing with it to check up close and personally on the JBL Control 1 and 5, a better RTA like the DEQ2496 would be good asset in the near future a few as I’d like one for left and right stereo front stereo surrounds centre and centre back and sub bass.

[grumpy]

Not sure if I follow you but I do catch on. Are you say the mix is a bit high end on the high frequency response? And that it needs to be calibrated for an even more flatter frequency response.Yes. This example of the ECM8000 I tested was roughly 3dB "hot" at 10KHz relative
to a very flat (albeit much more expensive) reference microphone.

If you were to calibrate a system for a flat measured response using the ECM8000,
the high end would actually be somewhat depressed. I don't know anything about the unit
to unit consistency, so I don't know if this is typical for all ECM8000's. A google search
might be worthwhile if interested.

[JBL 4645]

grumpy

I’ll take that onboard noted too high at 10KHz by as much as +3db. Thanks for telling me. :)

[grumpy]

This link appears to describe a very similar procedure to what I described, and
obtained a fairly similar result:

http://www.hometheatershack.com/forums/spl-meters-mics-calibration/314-professional-mic-calibration.html

[JBL 4645]

grumpy

Well, well :blink: that is surprising a fall band EQ linked to the MIC 100 output to even out the frequency response might do the trick and then of course there’s the room’s multi chain of EQ to address slight nit picks.

Damn this hobby is expensive thank goodness for Behringer otherwise I’d be spending hundreds if not thousands for a single microphone.

10hz -5.2db
15hz -2.7db
20hz -1.8db
30hz -0.8db
40hz -0.1db
4khz +0.4db
6khz +1.5db
8khz +2.5db
10khz +3.5db

[JBL 4645]

Went walkabout this morning first to make an appointment with my doctor, as I have a middle right ear inner problem kinder like a cold. So I’ll wait until Monday for that. After which I walked over to Boscombe to have look around brought some affordable loudspeaker cable from (Richer Sounds) for the surrounds, and while looking in (Eddie Moors Music) store I saw hiding away behind in the cabinet a (Behringer FBQ2496) for £109.00.

I’ll see if I can get the FBQ2496 powered for sometime tonight using a little improvisation, I need a few XLR plugs so I might have to wait until the morning to a few and some cable, but in the meantime I think I can use some spit and gum to do the trick temporally of course.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/FBQ2496JBLhomecinema1.jpg

So this is how the unit appears for now, nothing is powered up as of yet, I’ll get around to that in a jiffy. I’ll be using the unit for LFE.1 and sub bass extension, I’ve heard some good reviews of the unit working in the home cinema community for about a year now, so I’ll look some details up see what everyone else has done with it and apply some of those techniques to the programming of the FBQ2496.

[JBL 4645]

Well I Googled the name FBQ2496 added forums and found this to be helpfully interesting. So far I’ve taken onboard some of the details and it’s seems to be quite indispensable.

http://www.hometheatershack.com/forums/bfd-forum/35-bfd-guide-quick-links-faq-tips.html (http://www.hometheatershack.com/forums/bfd-forum/35-bfd-guide-quick-links-faq-tips.html)

http://www.hometheatershack.com/forums/bfdguide/ (http://www.hometheatershack.com/forums/bfdguide/)

[JBL 4645]

Well I have found a few phone plug leads with RCA phone on each end and attached those to the FBQ2496 input and outputs, set the operating button that is placed on the rear of the unit to the IN position as described in the link that I found. So far the unit is performing but no settings have been made as of yet, as I’m still reading though the users manual and the link about the use of the DSP1124P and BFQ2496.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/BFQ249poweredup.jpg

[JBL 4645]

Well I’m not sure if I’m winning as of yet I have however managed to use what is called PEQ which works from 1 though 20, that is the whole 20 bands of the parametric EQ, if I understand this correctly.

I programmed a board range of low frequencies from

20 Hz
25.1 Hz
30.2 Hz
35.1 Hz
40.3 Hz
45.2 Hz
50.2 Hz
55.0 Hz
58.3 Hz
60.3 Hz
62.3 Hz
65.4 Hz
70.1 Hz
75.1 Hz
80.5 Hz
85.3 Hz
90.3 Hz
100 Hz
124 Hz
141 Hz

I’ve played a brief moments of wideband pink from the dts demonstration set-up disc CD, track 14 all-channels with all the other channels turned off expect the centre channel which was set at very low volume for the time being as I don’t just want to hear low rumbling sounds I need a little something to help me concentrate, no matter I managed then to adjust the gain + and – this will raise or lower the level of the frequency on the BDF2496 to as much as +15db to -36db.

Next was the quality of the frequency which is called bandwidth this function worked from

1
2
3
4
0.10
0.11
0.12
0.14
0.16
0.20
0.25
0.33
0.50
0.75
1.0
1.5
2.0
3.0
4.0
5.0
6.0
7.0
8.0
10.0

So I think I’m nearly there expect now I need some sleep as its been a bit of long day so I’ll pick this up later and if anyone has this unit I’d like to hear about you hits and misses with the Behringer FBQ2496.

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/FBQ2496EQsetup3.jpg

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/FEQ2496EQsetup2.jpg

http://i232.photobucket.com/albums/ee18/DemolitionMan3417/FEQ2496EQsetup1.jpg

[JBL 4645]

I’ve noticed that I’m slowly getting surrounded by the “Behringer” there is no escape from the “Behringer!” there is another product that I would like to add to the home cinema and that is the (Behringer Ultrabass Pro EX1200) which was brought to my attention two years ago by a member over on the “Secretes of home theatre and high Fidelity.”

I’ve just done a quick Google Product search and found two places that is doing the (Behringer Ultrabass Pro EX1200) at an affordable low price called (Total Music Solution) £81.99 and UKDJ at £73.00 pounds wow well I never that’s a low price I doubt you could beat! So this will be added soon to the set-up!

So far I’ve added the

Behringer DCX2496
Behringer ECM8000
Behringer MIC 100

And more recently the

Behringer BFQ2496

[JBL 4645]

I plan to run the unit with two outputs one driving the (sub bass extension) that takes the low end from the LCR and surrounds as well.

The other remaining channel on the BFQ2496 will be used for the LFE.1 that drives different sub bass unit in the room. So I have two things to attend to as and when I get the whole thing totally up and running as I’m take this one step at a time no point in rushing.

I’d need to test the frequency response firstly by using the only reliable RTA unit in the room my Technics SH-8055 along with the Behringer MIC 100 pre-amplifier and the Behringer ECM8000 microphone.

I’ll do tests at one meter without any EQ then test it at the listening position not the small differences as well as playing an assorted use of films soundtracks that contain the wildest low end over the five channels and the LFE.1, also noting what it feels like as well so I’ll have a visual guide of what the frequency was and my own thoughts on what it felt like?

So this is going to take me a more than a few simple days of testing, only wished I had a few matching Behringer DEQ2496 to accompany this, because the unit has an RTA wide spectrum band for analyzing, oh well I’ll have to wait, small steps at a time no rush.

[duaneage]

http://mumayi1.999kb.com/pic/2007-08-02/e2e803n0tzwv63yu7xow.jpg

Just took this,give it to u as a reward:D

And this is why I married an Asian Woman, so graceful!

[JBL 4645]

And this is why I married an Asian Woman, so graceful!

Yes that is quite a pleasing dish I wouldn’t mind settling down with an Asian woman. :)

[ChopsMX5]

I'm sorry, but I'm still baffled as to the point of this thread...

It started out good enough with a rundown of the playback system and all, but now it's nothing but a story board of old movies that everyone has seen. :blink:

[JBL 4645]

I'm sorry, but I'm still baffled as to the point of this thread...

It started out good enough with a rundown of the playback system and all, but now it's nothing but a story board of old movies that everyone has seen. :blink:

Everyone, I wouldn’t make that assumption. The point is to see how well they sound on my JBL sound system that’s the point and if I happen to add any additional improvements then I’ll mention it.

Besides I’ve never seen “Who’s That Girl” before since yesterday afternoon.:D

[boputnam]

It started out good enough with a rundown of the playback system and all, but now it's nothing but a story board of old movies that everyone has seen. :blink:Good suggestion. This area needs to remain more technically focussed.

The in-depth DVD and movie reviews have been merged into their own thread, in the General | Music area.

:)

[JBL 4645]

an example comparison of Earthworks S30 (M30) and a Behringer ECM8000
(only one example of each, but I thought someone might find this interesting).
Ignore the small variations... getting -exact- mic placement
vs the test source is tough. Levels have been normalized. If you assume the
S30 is flat in this bandwidth, then the ECM8000 response is what the plot
represents (deviation from flatness).

-grumpy

Now let me see if I have this straight now. I need an additional EQ patched in-between the MIC100 to computer or whatever and trim the bump down on the high end until its reasonably flat