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matsj
11-29-2005, 01:04 PM
Hello

After a tip i have been looking at the "new" 2256g element which is fitted in vertec vt 4881 compact sub. It has a nice peak to peak with 3 inch :D .
Does someone know how much it costs in usa ? Here in sweden itīs realy expensive :( . Maybe someone have tested it ?

regards mats

pelly3s
11-30-2005, 12:24 AM
When my shop bought them for use in our monitors we couldnt buy the drivers new, we had to get them B stock

Guido
11-30-2005, 04:41 AM
Is it true, that the 2256G is the W15GTI Car Transducer? I read somewhere they use the same cone kit.

matsj
11-30-2005, 12:56 PM
Pelly3s: How much did you pay for them ? And where did you bought them ?

Guido: They look the same, but i donīt know.

I donīt find so much about 2256g :( except it handles a lot off power , 3" peak to peak and plays low.

regards mats

pelly3s
11-30-2005, 05:12 PM
i got them from jbl off their b stock list i cant remember

matsj
12-05-2005, 11:42 AM
I found it in the list 649 dollar each. I will maybe sell my 4 2245 to get these 2256g instead. They really work in small boxes ( Hmmmm 2245 in small boxes=NOT ). Does anyone have some specs on 2256g, i canīt find it on the web.Pelly3s : You might have some specs on it ?

Regards mats

andresohc
12-05-2005, 02:11 PM
I recieved a W15GTi today. It has sheets of specs and box designs. Would you like me to post them?

Zilch
12-05-2005, 02:19 PM
Some info here:


http://manuals.harman.com/JBL/CAR/Boxes%20and%20Parameters/W15GTi_rev_f.pdf

JuniorJBL
12-05-2005, 02:25 PM
I think Don posted somthing about this in one of the sub1500 threads

JuniorJBL
12-05-2005, 02:38 PM
Read this

http://www.audioheritage.org/vbulletin/showthread.php?t=1790&page=1&pp=15&highlight=1500

toddalin
12-05-2005, 03:17 PM
I was/am also considering a W15GTI for use as a sub but when you examine the T/S parameters, the linear excurion is not as long as a 2235, and much shorter than the 2245.

The efficiency of a 2235 is 1 dBA higher than the W15GTI. If the cone area is approximately the same as a 2235 and the linear excusrsion is shorter, wouldn't that infer that it couldn't play as loud regardless of the power handling ability?

Zilch
12-05-2005, 03:43 PM
Xmax is about 3 times that of 2235, no?

toddalin
12-05-2005, 04:06 PM
Xmax is about 3 times that of 2235, no?

My mistake, W15GTI is 0.8" each way, 2235 is 0.875" peak to peak. 2245 is 1" peak to peak. Maybe that 4th speaker will just be a W15GTI.:D (The seller of the K140 I bought on ebay for recone as a 2235 flaked out on me!:banghead: )

But why does JBL that have to print all that sh-- on the dust cap??? :biting: I'm just going to have to paint it out!;)

Based on cone excursion, the W15GTI can theoretically play 2.6 dB louder than a 2235. However, the 2235 is listed as being 1 dBA more efficient. Furthermore, for our use, we would probably run it at 12 ohms (as opposed the 3 ohms) resulting in a decrease of 1.8 dB from an 8 ohm 2235. So to get that extra 2.6 dBA out of the W15GTI, you would have to push some heavy duty watts through it.

johnaec
12-05-2005, 04:18 PM
I recieved a W15GTi today.I noticed you also recently grabbed a W12GTI off eBay - 'experiments? I've got a W10GTI here...

John

andresohc
12-05-2005, 09:33 PM
I originally bought a W12GTi on an auction over a month ago and the guy said it was "out of stock". I emailed last thursday saying I wanted my money back, at which time he promptly shipped me a W15Gti. I had already found a W12GTi. So know I have an extra W15GTi (as long as the 12 gets here). I think I have sold the 15 as long I get my 12. I have to upgrade my Swan 12 Madisound sub in my Camry. I didnt want to think about stuffing the 15 in. Now I need a bigger amp:D Dang that 15 is big....
I noticed you also recently grabbed a W12GTI off eBay - 'experiments? I've got a W10GTI here...

John

matsj
12-07-2005, 11:07 AM
I will email JBL to ask for the T/S parameters on 2256 and check if itīs the same on w15 gti.


regards mats

matsj
12-08-2005, 11:24 AM
I got some specs today.

W15GTI vs 2256g

vas: 132.20 vs 138.5 lit
fs: 25,20 vs 24,2
qts: 0,48 vs 0,47
qms: 7,20 vs 7,79
qes: 0,51 vs 0,5
xmax: 20,32 one way linear 20,3 mm

and so on.

The basket and magnet system should be the same on them.

regards mats

Dr.db
10-17-2016, 12:19 PM
Has anyone informations on the original vt 4881 enclosure using the 2256g :confused:
I think this was a vented bassreflex enclosure!?

But in my understanding this driver should work very well in a sealed enclosure.
Has anyone experience using the 2256g in a sealed enclosure?

ivica
10-23-2016, 10:46 AM
I got some specs today.

W15GTI vs 2256g

vas: 132.20 vs 138.5 lit
fs: 25,20 vs 24,2
qts: 0,48 vs 0,47
qms: 7,20 vs 7,79
qes: 0,51 vs 0,5
xmax: 20,32 one way linear 20,3 mm

and so on.

The basket and magnet system should be the same on them.

regards mats

Interesting so small Vas, ans so low Fs, is it possible ?

regards
ivica

JoeNelis
10-30-2016, 08:51 PM
Hi, i have bought some of these bass drivers 2256G and build a test box with the following dimensions. 50cm X 57cm x 41cm ( W x H x D).

The bass was deep and extended, these are excellent bass drivers that have a big impact. This was a sealed box too. Hope this helps.


Joe.

1audiohack
10-30-2016, 10:54 PM
Interesting so small Vas, ans so low Fs, is it possible ?

regards
ivica

Small signal measurments are close to meaningless on some of these huge motor, heavy cone speakers with suspension designed for very high power and very large Xmax / Xmech.

Constant voltage / low impedance measurements with a VI box at several Watts are required to even see the port frequency on many of the vented pro subs that I have measured in the last decade.

Barry.

Dr.db
10-31-2016, 02:36 AM
Hi, i have bought some of these bass drivers 2256G and build a test box with the following dimensions. 50cm X 57cm x 41cm ( W x H x D).

The bass was deep and extended, these are excellent bass drivers that have a big impact. This was a sealed box too. Hope this helps.


Joe.

Yes, indeed!
That would be about 3cubic feet internal volume...