Jbl Sub1500 15" Subwoofer 4 Ohm

[JuniorJBL]

What is your opinion (or anyone elses)of the 2256/GTI 15"/revel sub for home use versus an 18" 2242 or 2? I have 1 2242 with one on the way. but the space savings would be nice.

[johnaec]

Regarding the question on the 2256 sub used in the Vertec, I believe this is the 15" JBL GTI sub (i.e. car sub) with a different cone assembly.

Does that mean the 2256 has the 3" V.C. vs. the 4" in the 1500? Interesting that the 15" GTI actually has a greater Xmax spec'd than this 1500.

[JuniorJBL]

Originally posted by johnaec
Does that mean the 2256 has the 3" V.C. vs. the 4" in the 1500? Interesting that the 15" GTI actually has a greater Xmax spec'd than this 1500.

Looks to be true

http://www.jblpro.com/vertec1/new_vertec/pdf/VT4881.pdf

[Mr. Widget]

These three woofers are all quite different. The Vertec 2256 has dual tandem 3" coils. The GTI probably has higher distortion and sacrificed transient response since it is designed to make the rear window of a car rattle.

As for a comparison between the 2242 and the JBL/Revel woofer, the JBL/Revel has as good or better VLF performance in a 3-4 cu ft box as the 2242 has in an 8-10 cu ft box. Above 45Hz the 2242 can put out a bit more output, but the JBL/Revel is capable of 119dB from about 25Hz up. In a home, do you need more? You will need a lot of horsepower to do this, but it can do it.

I have heard these woofers in their Revel enclosures a couple of times. I was very impressed. To be fair to Revel part of their $4000 price was due to the very sophisticated electronics that came with them.

[JuniorJBL]

I have a crown K2 500wpc 8ohms 800wpc 4ohms 1250wpc 2ohms
I would think this is adequate

[4313B]

"In a home, do you need more?"

Evidently so!

Some guys are running dual 2234H's or 2235H's per side, some are running a 2242H or 2245H per side and a few are running dual 2242H's or 2245H's per side!

[JuniorJBL]

Originally posted by Giskard
"In a home, do you need more?"

Evidently so!

I would think a 15" driver might be a little faster than an 18" driver.
For jazz this might be a good thing. But an 18" would probably be better for rock and roll.

How about a PROFESIONAL opinion!!
We do have those here, right?
:shock:

[4313B]

Originally posted by JuniorJBL
I would think a 15" driver might be a little faster than an 18" driver.

Um, that would be a no. That SUB1500 appears to be dragging around a lot of weight with a less powerful motor than either the 2242H OR 2245H. I think the SUB1500 has +200 grams of moving mass doesn't it? That's roughly like sticking a 121A/121H mass ring into a 2235H.

[johnaec]

So how do you think that 1500 would compare with a 2245H?

John

[4313B]

I'm a big believer in A/B tests. I'd definitely like to get a pair of these SUB1500's for trials.

[johnaec]

Well, I went ahead and ordered one. 'Guess I'll be able to do some A/B tests with the 2245 before long...

[4313B]

Just one??? Hmmm... I thought running just one sub went out with the end of the Seventies...

[Mr. Widget]

Originally posted by Giskard
I'm a big believer in A/B tests. I'd definitely like to get a pair of these SUB1500's for trials.

Agreed!

I have a pair of 2245s waiting for cabinets. On paper the SUB1500 will put out a bit more VLF bass than even the 2245. I have a pair of 4 cu ft boxes that could happily accomodate them, but I would want to compare them to the 2245s. As for dual 2235s per side, I have that now and have exceeded their xmax on several movie sound tracks. The great thing about the 2235 is that they sound good well above sub woofer applications. The SUB1500 with all of that moving mass was truely designed for subwoofer applications.

[johnaec]

Originally posted by Giskard
Just one??? Hmmm... I thought running just one sub went out with the end of the Seventies...

Well, this is for my never-ending quest for the stongest 40hz for bass guitar I can get out of 6 cu.ft. or less cabinet. The 1500 may even allow me to get something significant below that with a subharmonic synthesizer I've got...what the heck...

[4313B]

"Well, this is for my never-ending quest for the stongest 40hz for bass guitar I can get out of 6 cu.ft. or less cabinet."

Ah!

Here are some additional numbers to play with.