SUB1500 Projects

[Niklas Nord]

I have not seen many projects suing SUB1500 on this
forum. Many where sold do members of this forum.

What have you all been doin with the SUB1500´s ?

Mine are just on the floor, waiting for me.. taking semester
and building the big big towers of mass destruction.

Would be fun to see some pictures, thoughts, data on the
cabinets and impressions of your projects.

for inspiration and fun

[sfogg]

I'm using four of the Sub1500s in my home theater in a pair of subs. Each cabinet is roughly 6 ft^3 and is sealed and stuffed with about 5lbs of Acusta-Stuf each. Front baffles on the cabinets are 1.5" thick. They are driven by a Crown K2.

Because I was too busy building the theater room I had John at Stryke Audio build the cabinets for me. He did a great job and was very reasonably priced.... less then half the cost of the drivers.

http://forums.smr-forums.com:8080/upload/DSCN2750-01.jpg

http://forums.smr-forums.com:8080/upload/DSCN2751-01.jpg

Because this is a theater I wasn't worried about a nice finish on these so I just spray painted them with a textured flat black finish.

This is the front speaker array.

http://forums.smr-forums.com:8080/upload/FRONT-ARRAY-ALL.JPG

Eventually it will be hidden behind an acoustically transparent black cloth but I haven't gotten around to doing that yet.

Shawn

[Niklas Nord]

So each driver has some 3 cubic feet, 87 liters per driver.
I guess you dont have to EQ these...


They look very compact, then i look at the pictures and
i guess they must be some 95cm high and 55cm deep
and 48cm wide... impressive..

waaooow
:eek:

Have you been trying theese out at some LOUD LOUD levels?
Do you feel the pressure :D

[sfogg]

"87 liters per driver. I guess you dont have to EQ these... "

I haven't measured their low end response yet in this room but it doesn't seem like they are going to need much in the way of a bass boost. The room is very solidly constructed (staggered studs, doubled drywall glued and screwed) and I think I'm getting some room gain which is helping to prop up their low end. I may try a little though just to see what it is like.

They are EQed by my Lexicon. That is to reduce the rooms resonances though not to extended their range down.

"They look very compact, then i look at the pictures and i guess they must be some 95cm high and 55cm deep and 48cm wide..."

Fairly close, they are 35" tall, 24" deep and 16" wide. The depth and height were sized to match the LaScalas next to them which helps to 'hide' their size. From the front they don't look quite as big but when you see them from the side they look larger.

http://forums.smr-forums.com:8080/upload/DSCN2753-01.jpg

"Have you been trying theese out at some LOUD LOUD levels? "

I've run them at +5dB over THX reference level during the attack sequence of 'Pearl Harbor' which means for the LFE channel they could potentially need to do 120dB at the listening position. The whole system handled that just fine though and I don't have the sub limiters turned on in the Lex.

"Do you feel the pressure "

You can feel the bass for sure. But I'm use to that as in my old room I was using a ServoDrive Contrabass for the LFE as well as a pair of smaller ACI sealed subwoofers. That setup wouldn't quite fit in the new room and I wanted stereo subs which is why I built these.

Shawn

[Niklas Nord]

Thank you, very interesting to read about your setup.

[Guido]

I like your K-Horns Shawn!

I started my audio "career" with them. :D

[andresohc]

Sfog, I love the braces he built into the boxes. Looks like he milled them but I guess he did it with a router? Did he dado them into the walls of the box or butt joint. Also did he use mdf and two layers of it on the baffle? I know you didnt build them but thought I might give the questions a go anyway. I have a pair of sub1500s temporarily in L200 boxes and need to build dedicated boxes.

[sfogg]

"Looks like he milled them but I guess he did it with a router?"

I think John has a CNC router which he did all the cuts on. I loved the braces too which is why I tried to get some shots of them.

Since they were CNCed he could probably duplicate them pretty easily if anyone was looking for a pre-built box.

"Did he dado them into the walls of the box or butt joint."

I believe it was just a butt joint but I didn't really inspect them very closly. If they were dadoed it was a very precise fit.

" Also did he use mdf and two layers of it on the baffle?"

Yup, all MDF and the front baffle is two layers. I was actually kind of kicking myself that I didn't have these done in Baltic Birch though. That way I could have finished that directly and the 'look' would have been pretty close to that of the LaScala's.

Hope this helps,

Shawn

[Mr. Widget]

That is damn loud!

I usually play movies at THX reference or just below. Typically when I have friends over THX -5dB seems to be a preferred level. Maybe all my friends are just mellow types. I have been known to play U2's Rattle and Hum or Stop Making Sense by the Heads at THX +10, but then I am trying to really recreate the experience of a live show.

My main speakers are rated at 101dB @ 1 watt compared to the LaScalas 105dB but seem able to get the job done pretty well with only one pair of Sub 1500s.

For some real shaking let me suggest the opening explosion of Cold Mountain or the mid air collision in Fight Club. The latter actually exceeds my measly pair of Sub 1500s at THX reference, but it really exceeds my threshold too! When the plane comes apart the sonic impact makes you feel as though you are being struck by shrapnel. I find turning down to THX -2dB is still plenty destructive!

Widget

[MJC]

[QUOTE]Originally posted by sfogg
[B]"87 liters per driver. I guess you dont have to EQ these...
They are EQed by my Lexicon. That is to reduce the rooms resonances though not to extended their range down.


Which Lexicon are you using? I've been thinking about getting a MC12 or MC8.

[andresohc]

Originally posted by sfogg
"

Hope this helps,

Shawn

Thanks, it helps a lot. I didnt notice you created an anechoic chamber for your room until I looked at it in photoshop :cool:

[sfogg]

Widget,

"That is damn loud! "

Yeah it was. That was the first day the room was really up and running (after many many hours of work) and my wife had friends over for a theater premier day. One of her friends husbands is also big into home theater. I had it playing at Ref level and he asked me to turn it up from there...never had that happen before. ;) That was to loud to regularly listen like that but for that one demo the power was awesome. We were both grinning like idiots after that.

It helps that my room is small and very solid (double drywall glued and screwed on staggered studs) so bass is a lot easier in there then in a large open floor plan. Also because the resonances are controlled it doesn't seem as loud. With the EQ turned off they are pounding away 5 or 10dB louder which makes the overall SPL level seem that much louder.

MJC,

"Which Lexicon are you using? I've been thinking about getting a MC12 or MC8."

MC-12B w/v4. Since that is sort of OT feel free to e-mail me if you have any questions on them.

andresohc,

"I didnt notice you created an anechoic chamber for your room until I looked at it in photoshop"

Doesn't do much of anything in the bass but it helps quite a bit higher up. Front wall (behind the screen) is 4" tiles. Entire ceiling is 2" tiles and the side walls up front are 3" then 2" tiles. I still need to do some on the rear wall and a little on the side walls by the listener.

Shawn

[merlin]

Has anyone got any information on the new W1500l as used in the HB5000?

Looks a meaty drive unit Niklas.

[4313B]

You mean the W1500H?

It's an updated version of the 1500SUB with a beefier frame, slightly improved excursion and lower distortion.

[Niklas Nord]

I´m crying
:mad:

[4313B]

Why??? Because with the cash you spent on sixteen of the 1500SUB drivers you could have bought maybe three of the W1500H drivers?

They aren't available yet anyway... Harman Japan is jumping the gun.

[4313B]

Originally posted by Niklas Nord
I have not seen many projects suing SUB1500 on this
forum. Many where sold do members of this forum.

What have you all been doin with the SUB1500´s ? I'm evaluating a pair, each one is running in a 3.4 cubic foot (gross) volume tuned to 28 Hz. Slightly larger volume than the HB1500 and tuned slightly lower (same physical size as the Citation 7.4 sub).

[Niklas Nord]

You like bas reflex then, why not the closed boxes?

[4313B]

No, I actually prefer these volumes sealed for my listening room.
I wanted to evaluate several options.

[Niklas Nord]

but have you finnished evaluating these SUB1500 ?
So you are going to use these in 3,4cu sealed cabs.
I presume corner placed.

[4313B]

No I haven't finished yet.

I'm currently using them with the second pair of 240Ti's I stole off eBay recently. Vented, they add very little extension to what the 240Ti's can already produce and they need to be run at -8 dB to keep from drowning out the 240Ti's.

I would most likely run them vented with the hybrid 4430's I'm working on. At least that is the intent.

Sealed they work extremely well with the hybrid 18Ti's (charge coupled 4406 networks) and modified L212's (Electro-Cap metallized polypropylene bypass capacitors installed) I've tried them with so far.

[Niklas Nord]

I´m still figuring of I should run them in 50liters or 65liters or 80liters or 100liters cabs sealed...

Has anybody been making any measurements to see what the big difference is?

[korgroenewoud]

I now use two b380 running with my S3100 MK II.
Do you think two sub 1500 would be an improvement? Im very staisfied now.


Kor

[4313B]

The answer to that Kor is based entirely on whether or not you can aquire a pair of 1500SUB transducers. If you can then the answer is "hell yes". If you can't then the answer is "hell no".

Niklas, I would go with 85 to 100 liters and call it a day. If you have some nice EQ available then go with 55 liters.

[Zilch]

This is SO easy if you have B380's. Put Sub1500's in them and plug the ports with plumbers' test plugs. Dispense refreshing beverages as required.... ;)

See this earlier thread. (http://audioheritage.org/vbulletin/showthread.php?s=&threadid=2731&highlight=4628B)

[4313B]

Exactly!
Run 'em sealed or leave 'em ported.

[Niklas Nord]

More pics and projects people !!

[Niklas Nord]

ping

[4313B]

Anyone think of putting a 1500SUB in place of the second 2234H in a 4435 and bi-amp the whole mess? Heck, tri-amp it!

[Zilch]

Originally posted by Giskard
Anyone think of putting a 1500SUB in place of the second 2234H in a 4435...?It oughtta work just straight, no?

'Course, A/B'n 'em gonna be somewhat of a challenge.... :rolleyes:

[4313B]

I was thinking that one would want to put a separate amp on the 1500SUB and get the 18 mH choke out of the picture. I suspect the 1500SUB has too low of an impedance to work as a "bolt in". Going active would also "clean up" the 2234 under the 2344.

[grumpy]

don't they (2235/2234) also share airspace in
the 4435 design? Might want separate chambers
so you don't "pop" the 2234... ?

-grumpy

[4313B]

They are separate chambers. Definitely a good point though.

[Niklas Nord]

Interesting idea indeed.

oh, i was thinking of a SUB1800 :D Why is there no such one :D :D

BoomBang

Or if JBL would make 24 inch drivers, SUB2400, disaster would strike

'

A while ago, i was thinking of making some bottoms for my fathers JBL4312 to place under them :)

[Niklas Nord]

this old thread.. upp...