vertec vt 4881 sub . 2256g

[matsj]

I will email JBL to ask for the T/S parameters on 2256 and check if it´s the same on w15 gti.


regards mats

[matsj]

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]

Has anyone informations on the original vt 4881 enclosure using the 2256g
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]

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]

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]

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]

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...