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View Full Version : Best sub/bass for HIFI 4645c or sub 1500 in sealed boxes?



Kalle
11-04-2013, 07:27 AM
I have the opportunity to buy either 2 JBL 4645c or 2 JBL sub 1500 i sealed boxes. Most important for me is music but I also use it for HT. I`we read that some people prefer 2242 for HIFI and sub 1500 for HT. I guess the 4645 is another leage in output but dont go as low as sub 1500. Will 2 sub 1500 b to litte if iIlike to play loud in a medium size room? I have big amps for them.

Whitch one do you prefer?

Regards Karl

Mr. Widget
11-04-2013, 08:23 AM
The 4645 will play significantly louder, the Sub1500 in a sealed cabinet is my favorite for music, but it won't play super loud especially in a larger space. I had two Sub1500s in larger vented cabinets and they were able to play with great authority in a very large room, but they were best for HT. For music I preferred them in sealed boxes.

This is all quite subjective though... you might feel differently about these.


Widget

hlaari
11-04-2013, 09:35 AM
I have the opportunity to buy either 2 JBL 4645c or 2 JBL sub 1500 i sealed boxes. Most important for me is music but I also use it for HT. I`we read that some people prefer 2242 for HIFI and sub 1500 for HT. I guess the 4645 is another leage in output but dont go as low as sub 1500. Will 2 sub 1500 b to litte if iIlike to play loud in a medium size room? I have big amps for them.

Whitch one do you prefer?

Regards Karl

I have owned 2256g, sub1500 and 4645c and for medium size room I like sub1500 and 2256g better
for larger room 4645c will do a better job than sub1500 because they have much more output

Like Widget said you can use sub1500 in both sealed or vented enclosure

2256g have more output than sub1500 perform close to sub1500 and they can also go much lower than 2242h in the 4645c

Kalle
11-05-2013, 07:45 AM
Would a smaller box than the 4645c be better? What I can read the synesis s1 (6,5ft)only have a little less output and less group delay than the 4645(8ft). (not a problem in home enviorment) but goes as deep or deeper?!

Mabye I should think of my ears and settle with the sub 1500:dont-know: It seems to be a very nice speaker:) If I`m not happy mabye I can get 2 more.

For reference earlier I had 2 2241 feeded by about 6-700w each and I thougt that was a nice output:) (but not the best sound)

Mabye I will buy JBL LSR32 for them also if it makes any diffrence.

Regards
Karl

Mostlydiy
11-05-2013, 07:56 AM
If I`m not happy mabye I can get 2 more.



That is not as easy as you think. They are quite rare.

/Mostly

Kalle
11-05-2013, 08:28 AM
That is not as easy as you think. They are quite rare.

/Mostly

Actually I have noticed that. I emailed "Niklas Nord" that I know had a lot of them but havent got any awnser. Is he active? Any thougts on box sice of the 2242?

/Kalle

Bobecca
11-05-2013, 11:59 AM
Would a smaller box than the 4645c be better? What I can read the synesis s1 (6,5ft)only have a little less output and less group delay than the 4645(8ft). (not a problem in home enviorment) but goes as deep or deeper?!

Mabye I should think of my ears and settle with the sub 1500:dont-know: It seems to be a very nice speaker:) If I`m not happy mabye I can get 2 more.

For reference earlier I had 2 2241 feeded by about 6-700w each and I thougt that was a nice output:) (but not the best sound)

Mabye I will buy JBL LSR32 for them also if it makes any diffrence.

Regards
Karl

I am intrested in why you say that 2241 didnt have the best sound?

I am running a pair of 4641 subs powered by crown MAI 5000 in y-link mode. No problem with good tight bass sound from those two cabs. The bandpass is between 25-80hz.

Maybe the good bass sound is also due to that I have solved my modal issues in my room and distributed the modal resonances evenly througout the room. The bass response is totally flat in my room.:)

I listen to any kind of music with diffrent sources. CD, vinyl, music and films from computer.

Kalle
11-05-2013, 12:25 PM
Actually for me they were ok. Most I think it was because placement and enclosure (one big box), SR enclosure (4719x, dual 2241 tuned to 40hz) no damping in the box. So the biggest reason they go away is because that the boxes are big. And also because people say that the 2242 sounds so much better (And deeper). But actually I don`t know and want to try something new. I have no doubts that your 4641 sounds good and leave a nice output:) I quess the enclosure is the key in this case.


I am intrested in why you say that 2241 didnt have the best sound?

I am running a pair of 4641 subs powered by crown MAI 5000 in y-link mode. No problem with good tight bass sound from those two cabs. The bandpass is between 25-80hz.

Maybe the good bass sound is also due to that I have solved my modal issues in my room and distributed the modal resonances evenly througout the room. The bass response is totally flat in my room.:)

I listen to any kind of music with diffrent sources. CD, vinyl from computer and if I want to see movie I do that as well with my system.

ivica
11-06-2013, 12:57 AM
Actually for me they were ok. Most I think it was because placement and enclosure (one big box), SR enclosure (4719x, dual 2241 tuned to 40hz) no damping in the box. So the biggest reason they go away is because that the boxes are big. And also because people say that the 2242 sounds so much better (And deeper). But actually I don`t know and want to try something new. I have no doubts that your 4641 sounds good and leave a nice output:) I guess the enclosure is the key in this case.

Hi Kalle,

From JBL technical notes, it seems to me that 2242H used "in pair" would be very good solution.
But if single driver (per box) is used it seems to me that 2241H would give more linear response at lower frequency (without the EQ)
May be some more data (and JBL suggestion) can be find in: Technical Notes Volume 1, Number 22 :
http://www.cieri.net/Documenti/JBL/Technical%20Notes/JBL%20Technical%20Note%20-%20Vol.1,%20No.22.pdf

"...At 80 watts input, the third harmonic distortion of the 2242H is about 10 dB lower at 40 Hz than that of the 2241H, while second harmonic distortion is about the same....
......In the mid-band, between 100 and 500 Hz, the distortion in the 2242H is about 7 to 10 dB lower than in the 2241 H. Remember that, in these curves, we are running the 2242H at 80 watts, as compared with 60 watts for the 2241 H.......
....The 2242H operates in similar alignments to the 2240H, but with higher input power capacity, maximum output capability, and greater linear excursion. The 2242H has excellent characteristics when used in moderate sized subwoofers, such as the JBL 4645B. In this application, a 225 liter (8 cubic foot) enclosure is tuned to 25 Hz, giving a typical over-damped response that extends smoothly
from 100 Hz down to 25 Hz. Such a curve can easily be equalized for flat response over that bandwidth, particularly if multiple subwoofer modules are used. In this usage it is the functional replacement for the 2245H, as it also has approximately the same linear excursion (Xmax) and volume displacement (VD) capability..."

Regards
Ivica

hjames
11-06-2013, 02:56 AM
Actually for me they were ok. Most I think it was because placement and enclosure (one big box), SR enclosure (4719x, dual 2241 tuned to 40hz) no damping in the box. So the biggest reason they go away is because that the boxes are big. And also because people say that the 2242 sounds so much better (And deeper). But actually I don`t know and want to try something new. I have no doubts that your 4641 sounds good and leave a nice output:) I quess the enclosure is the key in this case.

Love my 4641 - plays nice and low for films and the cabinet
and isn't too darned big (with a bit of disguise over in the corner).

60526
60525

pos
11-06-2013, 03:25 AM
Heater, is it a Sontaran or do you have a 4:3/16:9 scaling problem on your TV?

martin_wu99
11-06-2013, 08:05 AM
I have the opportunity to buy either 2 JBL 4645c or 2 JBL sub 1500 i sealed boxes. Most important for me is music but I also use it for HT. I`we read that some people prefer 2242 for HIFI and sub 1500 for HT. I guess the 4645 is another leage in output but dont go as low as sub 1500. Will 2 sub 1500 b to litte if iIlike to play loud in a medium size room? I have big amps for them.

Whitch one do you prefer?

Regards Karl
IMO,they are all not very suitable for hifi,only for HT,but if you use 4645 with 2245,it will be ok for hifi

martin_wu99
11-06-2013, 08:10 AM
Love my 4641 - plays nice and low for films and the cabinet
and isn't too darned big (with a bit of disguise over in the corner).

60526
60525
Heather,who's word on the board?what that mean?:D

hjames
11-06-2013, 08:15 AM
Heather,who's word on the board?what that mean?:D

My wife had a friend from church make that tile for her ...

Its a slight rewording of a quote from the movie: The Best Exotic Marigold Hotel

http://www.imdb.com/title/tt1412386/?ref_=fn_al_tt_3
The manager and owner is always saying:

Everything will be all right in the end...
if it's not all right then it's not yet the end.


Heather, is it a Sontaran or do you have a 4:3/16:9 scaling problem on your TV?
Yep - Its a Whoovian screen of a Sontaran, but its an old picture.
See my Avatar - I've since changed the TV as well as the carpet!

Kalle
11-06-2013, 09:56 AM
IMO,they are all not very suitable for hifi,only for HT,but if you use 4645 with 2245,it will be ok for hifi

Both 2242 and sub 1500 or only 2242?

Im thinking of the LSR32 and sub 1500 as my hottest choice.

/Karl

Bobecca
11-06-2013, 10:26 AM
IMO,they are all not very suitable for hifi,only for HT,but if you use 4645 with 2245,it will be ok for hifi

Oboy, how wrong you are, but it is your opinion.
Like I said, I use mine just mainly for hifi:D

Bobecca
11-06-2013, 10:27 AM
Both 2242 and sub 1500 or only 2242?

Im thinking of the LSR32 and sub 1500 as my hottest choice.

/Karl

If that is your hottest choice, then go for it!

Let us know how it turned out!

hlaari
11-06-2013, 11:20 AM
I think at there were interested to hear how 2269G/H will work in the 4645B/C enclosure
I only see people here talk about the 18" 2241, 2242 and 2245

have no one try or hear the 2269G/H?

1audiohack
11-06-2013, 07:15 PM
Love my 4641 - plays nice and low for films and the cabinet
and isn't too darned big (with a bit of disguise over in the corner).

60526

Nicely done!

Mctwins
11-08-2013, 08:25 AM
Frequency response of two JBL 4641, measured at listening position, distance 4meters, crossover at 80Hz. Bobeccas system.

No need for high-end sub:D. Again, room acoustics is the solution.:)

60534

Mr. Widget
11-08-2013, 08:58 AM
Frequency response of two JBL 4641, measured at listening position, distance 4meters, crossover at 80Hz. Bobeccas system.

No need for high-end sub:D. Again, room acoustics is the solution.:)

I'm sorry but I have to take exception with two points in your post.

1. A frequency response plot may tell us a lot, but it doesn't tell us how a speaker actually sounds.

2. To my knowledge no system accurately measures low frequencies, say below 100 Hz, in smaller rooms. I'm not saying your plot is "wrong", but moving the mic around the listening area by only a foot or two will very likely result in fairly different results.

That said I am sure those subs can offer deep bass in the right deployment and I also agree about the importance of room design.


Widget

spkrman57
11-08-2013, 09:18 AM
I also agree about the importance of room design.
Widget

I actually voice my spkrs as much by textbook, then I have several different tests I use in my room to tell me how the drivers are acting in MY environment.

I have played many spkr systems on as many different amps/preamps/rcvrs and I know pretty much where my room helps me(LF gain down to where the room is too small to support the wavelength. Going into the kitchen the lower notes are felt/heard easily. Just a matter of physics there!).

The mid/HF section is very bright since I'm 6 ft away from my spkrs, so I have to bring down their sensitivity as my ears are overly sensitive in that area.

Just my 2 cents worth...

Ron

Kalle
11-08-2013, 10:54 AM
Mabye I`ll have to buy both and then I know. I don`t think the pair i don`t want will be extremly hard to sell. The LSR 32 seems very prommising after some research on the net:) For now I`m listening to another Harman produkt (and drinking beer), "Infinity Kappa 90" what do you think about them?

(sorry for the spelling, second language + beer)

/Karl

Mostlydiy
11-08-2013, 12:09 PM
Im surprised the sub1500 are still up for sale. Someone should have snitched them up by now...

Kalle
11-08-2013, 12:41 PM
Im surprised the sub1500 are still up for sale. Someone should have snitched them up by now...

I will give the seller a call after the weekend. Well see:) I haven`t have time for speakers this week:(

JuniorJBL
11-12-2013, 07:42 AM
Another option for subs IMHO is LE14H-3's. I feel 2 of them is the equivalent of a 2245 with more power handling.

I prefer them to the sub1500's I own or the 2242's. I do use the 2242's for HT but no hifi. The sub1500's just do not have the fine detail of the -3's in my listening room.

Mr. Widget
11-12-2013, 08:13 AM
Another option for subs IMHO is LE14H-3's. I feel 2 of them is the equivalent of a 2245 with more power handling.

I prefer them to the sub1500's I own or the 2242's. I do use the 2242's for HT but no hifi. The sub1500's just do not have the fine detail of the -3's in my listening room.I think this brings up the question what is the sub for? The LE14H-3 is a fantastic woofer, but it won't dip into the low 20s like a Sub1500 can.

I've used the Sub1500s in HT duty at the standard 80Hz and in music systems at 50Hz... the LE14H-3 is excellent up into the mid frequencies, but it doesn't have the xmax to plumb the depths at any kind of power level.


Widget

JuniorJBL
11-12-2013, 08:29 AM
I think this brings up the question what is the sub for? The LE14H-3 is a fantastic woofer, but it won't dip into the low 20s like a Sub1500 can.

I've used the Sub1500s in HT duty at the standard 80Hz and in music systems at 50Hz... the LE14H-3 is excellent up into the mid frequencies, but it doesn't have the xmax to plumb the depths at any kind of power level.


Widget

As I pointed out IMO I don't feel the sub1500 is as detailed as the -3. The -3 goes into the 20's as long as there is some eq involved and the box is 5 cu ft and tuned to about 25hz. Again this is just my findings in my room.

OTOH the sub1500 will do this stuff in a much smaller box (2cu ft sealed) but eq is still needed to achive the 20's as useable FR.

I cross the -3's (2 of them) at 55hz and a boost of +6db at 25hz in my music room and it is very enjoyable to listen to. But as we all know what is best for me may very well not be to anyone elses liking.

I have yet to try some HTPS400's to see what they are like though...........

And who knows, I may like something else when I build the 1500AL bottoms to go with the 1200Fe's.:dont-know:

spkrman57
11-12-2013, 08:41 AM
I had the LE-14-1's in L55 cabs and I was impresses.

The other sub drivers mentioned are different in how low and how much power they can handle, and total output.

I thought the 2242's I had were the most dynamic subs I ever heard.

For average listening I would prefer the LE-14's if high levels are not required.

My 1501Fe's are kind of like a cross between LE-14's/2226's if I could describe them so far.

Lots of good discussion in this thread!

Regards, Ron

4313B
11-12-2013, 08:49 AM
I think this brings up the question what is the sub for? The LE14H-3 is a fantastic woofer, but it won't dip into the low 20s like a Sub1500 can.

I've used the Sub1500s in HT duty at the standard 80Hz and in music systems at 50Hz... the LE14H-3 is excellent up into the mid frequencies, but it doesn't have the xmax to plumb the depths at any kind of power level.


WidgetWith respect to the LE14H in the L250/250Ti - "That thing goes damn near to DC..." Gotta love Timbersisms ;)


You are theoretically correct though with respect to the LE14H used for sub duty. However, I personally have always thoroughly enjoyed the Citation 7.4 version. Can't say the same for the PS1400 version.

The Revel Gem using the SUB1500 is also supposed to be very good.

The 2245H was simply magical, I'll never forget that transducer. I liked it best of all. Nothing new does quite what it did.


I thought the 2242's I had were the most dynamic subs I ever heard.
"Those things aren't of this planet..."

Yeah, the first time I compared them to the 2245H I was really surprised at how clean they sounded. Too clean for me personally. :p They really weren't the replacement for the 2245H though. I forgot which model D.B. said replaced the 2245H - 2268H or 2269H, something like that. It all had to do with how they were to be used in Pro apps. With or without boundary reinforcement, the 2245H not needing any, the 2242H needing some. Same for their neo replacements. :blah: :blah:

Kalle
11-12-2013, 10:58 AM
Very nice with all answers:)
I will go for the sub 1500 (+LSR32). It seems to be a matter of taste more than one is better than the other. If I`m not pleased (which I doubt) I can try the 2242. The smaller boxes is also quite nice and they are nice locking at as well.
Will this amp be to powerful for the 2x sub 1500? http://labgruppen.com/media/downloads/product/Lab2002-keyfeatures+specs.pdf It is possible to limit it with the -2db buttom to 1100w.

/Kalle

more10
11-12-2013, 12:41 PM
You cannot have a too powerful amp :-)

Mctwins
11-13-2013, 07:56 AM
I'm sorry but I have to take exception with two points in your post.

1. A frequency response plot may tell us a lot, but it doesn't tell us how a speaker actually sounds.

2. To my knowledge no system accurately measures low frequencies, say below 100 Hz, in smaller rooms. I'm not saying your plot is "wrong", but moving the mic around the listening area by only a foot or two will very likely result in fairly different results.

That said I am sure those subs can offer deep bass in the right deployment and I also agree about the importance of room design.


Widget

You will hear difference if you have resonances in the room that is not treated compare with treatment with tuned HH resonators.

ARTA acoustical program measure quite well regarding to low freq. It is best to look at the Burst decay plot in ARTA to see if there is resonances in the room.

Burst Decay with two JBL4641, NO resonances:bouncy: Measaured at the same distance as previous freq response plot(listening postion).

60623

Trust me, it sounds good as the measurements shows.

Bobecca
11-13-2013, 09:53 AM
Hi,

Just want to add to Mctwins post. It is true that if one measure in one spot is not enough and the freq resp will alter with different points, but in my case it holds pretty good if one would takes several measurements around the vicinity of LP and avarage them out. And that was the goal in the first place, to have as little deviation between diffrent measurements points in the LP as possible.

The biggest advantage with the graph provided is that the resonances is intact througout several different positions when measured. This is the most important one. The bass is good not only in the LP but anywhere in that room! despite the small deviations in the pressure.

Hope it makes sence;)

Kalle
11-15-2013, 09:55 AM
Now I got 2 sub 1500 i sealed boxes about 2,4 cuft. (75L) and LSR 32 monitors. I have just connected it and I think they sound nice. I have done no setting only LP LR24 @80hz at the subs. How much EQ at the bottom is a good start? Will they need a HP-filter?

What was the name ot the (Revel?) subs the were originally placed in?

/Karl

4313B
11-15-2013, 10:00 AM
Ultima Sub-15 and the name of the transducer was the "Revel 15" aka JBL "SUB1500".

http://www.stereophile.com/standloudspeakers/89/index.html


The Ultima Sub-15/LE-1
The sealed-box Ultima Sub-15 visually matches the Gem, though the side cheeks are now top and bottom cheeks. A monstrous 15" driver with a stiff kapok- and Kevlar-impregnated pulp cone, a huge nitrile rubber surround, and a cast aluminum alloy frame provide the grunt. This drive-unit features a 4" edge-wound voice-coil that weighs almost six ounces and is said to be capable of 1.5" of peak-peak excursion! The Sub-15 is intended to be used with Revel's Ultima LE-1 monophonic power amplifier, which incorporates the optimum crossover and response-shaping circuitry. Specified power is 725W into one Sub-15 or 1200W into two. A remote control is provided so that the user can adjust the blend between the satellites and subwoofer from the listening position—a red LED display on the front panel provides visual feedback. This amplifier can be used to drive one or two Sub-15s, and has both balanced and unbalanced inputs and outputs.

Mr. Widget
11-15-2013, 10:42 AM
Ultima Sub-15 and the name of the transducer was the "Revel 15" aka JBL "SUB1500".Years ago I heard a demo with two Ultima Sub-15s and one of their amps... I was so blown away that when the Parts Express blow-out of these woofers came along, I bought a rail car of them. Most have found other homes, but I still have a few pairs and still love them.


Widget

JuniorJBL
11-15-2013, 12:02 PM
Congrats on the woofers!!;)

I crossed my 1500's at 55hz/24db and had a boost of +6db at 20hz and a mid Q of about .25 on the boost. They too were in a small 2.23 cu ft sealed box. I never ran a subsonic filter on my 1500's.

How much eq will be a personal choice and dependent on your room.

Enjoy


Now I got 2 sub 1500 i sealed boxes about 2,4 cuft. (75L) and LSR 32 monitors. I have just connected it and I think they sound nice. I have done no setting only LP LR24 @80hz at the subs. How much EQ at the bottom is a good start? Will they need a HP-filter?

What was the name ot the (Revel?) subs the were originally placed in?

/Karl

Kalle
11-20-2013, 11:42 PM
I`we noticed that I have some sounds in one of the sub 1500 at some frequencies at higer SPL. It sounds like a bang/clap. Is this the glue problem? Mabye has to be re-glued? I know a guy that can do that for me.

/Karl

Mr. Widget
11-21-2013, 07:36 AM
I`we noticed that I have some sounds in one of the sub 1500 at some frequencies at higer SPL. It sounds like a bang/clap. Is this the glue problem? Mabye has to be re-glued? I know a guy that can do that for me.

/KarlIf you are talking about very loud levels and the sound is a very loud pop, you are hearing the VC slamming into the back of the motor structure. This happens when the driver is unloaded. If your design is a sealed box, it is leaking. If it is a bass reflex design, your tuned ported box is tuned too high for the frequencies you want to play.


Widget

Kalle
11-21-2013, 09:16 AM
If you are talking about very loud levels and the sound is a very loud pop, you are hearing the VC slamming into the back of the motor structure. This happens when the driver is unloaded. If your design is a sealed box, it is leaking. If it is a bass reflex design, your tuned ported box is tuned too high for the frequencies you want to play.


Widget


Hi!

Yes it is a pop.
I have sealed boxes. I removed the driver and mabye it could have been leaking where the driver is mounted. I coulden feel any leaking when playing but it`s not to easy to feel right beside the driver. I`m gonna check after some list to put where the driver is mounted. I will report after doing this.

Actually I can hear it a little with the other driver too when listening.
This could not be the result of a to powerful amp?

Regards Karl

Mr. Widget
11-21-2013, 09:46 AM
If you have a proper seal, when you CAREFULLY and evenly press the cone in, it should be extremely slow to come back to it's forward position.

If you perform this test and both woofers are VERY slow to come back to their normal at rest position, then you are over driving them in the deep bass and need a roll off filter or more woofers or both.

FYI: They will not play extremely loud in sealed boxes and are 10dB louder in properly ported boxes. That said, they sound very different in ported boxes with more "bloom".


Widget

Kalle
11-21-2013, 10:20 AM
If you have a proper seal, when you CAREFULLY and evenly press the cone in, it should be extremely slow to come back to it's forward position.

If you perform this test and both woofers are VERY slow to come back to their normal at rest position, then you are over driving them in the deep bass and need a roll off filter or more woofers or both.

FYI: They will not play extremely loud in sealed boxes and are 10dB louder in properly ported boxes. That said, they sound very different in ported boxes with more "bloom".


Widget

When I press the cone in I can hear air comming out round the baffle. It goes back to normal in max 0,5 seconds so I guess you found my problem:) Thanks!
I already have HP filter 12db/20hz. I feel quite comfortable by the spl but a little more fysical punch would not be wrong:) Mabye I should test ported. What would be o good size? So I can check if I can find a temporary box and only tune for testing.

What do you use between the driver an baffle to prevent leak?

/Karl

Mr. Widget
11-21-2013, 11:36 AM
Mabye I should test ported. What would be o good size? So I can check if I can find a temporary box and only tune for testing.

What do you use between the driver an baffle to prevent leak?

/KarlI used 5 cu ft enclosures tuned to 20Hz. This provided a hell of a wallop... when called for. Not as tight and refined as the sealed version, but a very pleasant boom!

You will need to find some gasket material.


Widget

Kalle
11-22-2013, 05:32 AM
That did not help. Its only one of the subs that have that sound. Now it dosent leak but still makes noices at high levels. Tested with no eq and still the same. A friends friend had a simular problem and in his case it was the glue issue. It costs me max 100usd to have it sent and repaired. (if it needs repair) Mabye ill try to swith the boxes to make sure its not a enclosure problem. Any other suggestions?

Regards
Karl

hjames
11-22-2013, 06:16 AM
Have you tried locating the sound using something like a cardboard tube from a roll of paper towels or wrapping paper?
With a narrow tube like that held up to your ear, sometimes you can better pinpoint the place where the sound is coming from,
and perhaps better locate what it actually is?

I remember one of the folks here had a problem with part of the spider on a driver coming loose and flapping ...




That did not help. Its only one of the subs that have that sound. Now it dosent leak but still makes noices at high levels. Tested with no eq and still the same. A friends friend had a simular problem and in his case it was the glue issue. It costs me max 100usd to have it sent and repaired. (if it needs repair) Mabye ill try to swith the boxes to make sure its not a enclosure problem. Any other suggestions?

Regards
Karl

Mr. Widget
11-22-2013, 07:57 AM
Getting them fully sealed can be difficult. Have you tried the push in test again... it should take several seconds to restore.

If the glue is bad you can visibly see the spider is lose and it will make distorted sounds at fairly low levels.


Widget

Kalle
11-22-2013, 10:27 AM
Getting them fully sealed can be difficult. Have you tried the push in test again... it should take several seconds to restore.

If the glue is bad you can visibly see the spider is lose and it will make distorted sounds at fairly low levels.


Widget

I takes several seconds to restore both drivers now. (Before about 0,5 sec) The sounds follows the driver. I`we tested to swicth the boxes. I can`t visually see anything wrong with the driver. Where and how to look? My friend (Sebachman) talked about to sweep them with a tone generator.

At lower levels I can`t hear any diffrenses between the drivers.


/Karl

Odd
11-22-2013, 11:21 AM
Read here (http://www.audioheritage.org/vbulletin/showthread.php?29841-Sub1500-problem-%28again%29) and here (http://www.audioheritage.org/vbulletin/showthread.php?2558-Sub1500-problem&p=86529&viewfull=1#post86529)
Maybe you can find a solution.

grumpy
11-22-2013, 11:58 AM
"Tinsel" leads are properly dressed? They can smack the cone at large excursions if not placed to minimize this.

Mr. Widget
11-22-2013, 12:01 PM
Sounds like one of your drivers is not quite right. It could very well be the spider glue issue, but it might be something else. If you can't see a problem I think you should take that woofer to a speaker repair shop.

Widget

Kalle
11-25-2013, 09:04 AM
"Tinsel" leads are properly dressed? They can smack the cone at large excursions if not placed to minimize this.

One of them where close to the cone and I can se on the cone that it has ben in contact with the lead. This was the problem.

I`we checked Odd`s tips and can`t see anything of that on my driver.

Thanks for your posts and help:applaud:

But still near or @ clip level none dosen`t sound wery great. I have 12db hp @20hz. Can it be so that as widget says that they are beeing over driving? The amp is speced 1400rms at clip an 1900w max. I can limit the amp to 1100wrms.
Also the enclosure has no bracing. 3/4" MDF and baffle double 3/4" MDF. Can it be reconances in the box?

Regards Karl

/Karl

Mr. Widget
11-29-2013, 09:53 PM
It may be cabinet issues, but a less than rigid cabinet will most likely simply be lossy and cause you to lose some output... Ultimately I think you are asking for more output than a single pair of these speakers are capable of.

If listening at these SPLs is your requirement, then you should consider the 2242s... they will put out a hell of a lot of sound with very little complaining!


Widget

JuniorJBL
11-30-2013, 05:36 AM
If listening at these SPLs is your requirement, then you should consider the 2242s... they will put out a hell of a lot of sound with very little complaining!


Widget


+2 ;)