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Old 10th December 2008, 04:24 AM   #1
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Default JBL 2206 box size

I see that JBL says to use a one cu/ft sealed box, but when I use unibox it says .5 cu/ft. is correct. Will it work in a .5 box?
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Old 10th December 2008, 04:46 AM   #2
HK26147 is offline HK26147  United States
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I've got a couple but haven't tried them in that size sealed cab.
It looks like in a .5 cu. ft. box it would be close to a Qtc of .707 Second Order Butterworth (B2) Max Flat Amplitude.
This is a popular median alignment for sealed cabs and probably why Unibox picked it.
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Old 10th December 2008, 11:23 AM   #3
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Use what JBL reccomends.

Rob
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Old 10th December 2008, 11:25 AM   #4
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remember to subtract for the volume of the speaker and anything else inside the box, and take into account box losses, Ql...

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Old 10th December 2008, 11:56 AM   #5
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What is the volume a 2206 displaces?

RobH - I understand JBL know's best, but why would the recomend a box that has a Qtc of .57. There is some additional extension of 1.5 db at 60 Hz in the larger box? In my application I will not be going lower than 80 or 100 hz.
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Old 10th December 2008, 01:21 PM   #6
HK26147 is offline HK26147  United States
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Yes a larger box would drop the F3. A sealed cab has a gradual -12db/octave roll off anyway.
Philosophically, I consider a woofer to be an engine that has a performance envelope. You can jam alignments, trading off goals, extension for size, and vs versa etc.
I have heard the 2206 in a variety of cab designs and sizes, and implemented corrected sounded great.

Volume displaced by driver: 0.2 cubic feet
* I'm guessing this is an approx.

Edit JBL's pdf on this says 4l (.15 cu. ft. )
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Old 10th December 2008, 01:44 PM   #7
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HK - Did you ever listen to a .6 ft box.
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Old 10th December 2008, 01:58 PM   #8
HK26147 is offline HK26147  United States
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No.
FYI: I just finished rebuilding 2 of these and a 2226H and ran impedance sweeps and T/S parms. I have considered making a "standard" 1 cu. ft. test box, for the 2206, but nothing that small, even though it fits T/S wise, JBL recommendations are from 1cu ft sealed - 4 cu. ft vented.
The pro use apps I am most familiar with are in larger cabs.

May I ask? What's the app.? Are you planning on hi-passing to these w an active xover, w subs for the bottom octaves?

Syd
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Old 11th December 2008, 01:17 PM   #9
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This is for a very simple home theater setup, not really to worried about super acurracy. Active crossover, with a single self powered Pioneer subwoofer for the bottom. The sub has a self contained electronic crossover variable from 50 to 120 Hz. I got some small cheap book shelves (don't ask) that can't get anywhere 120 with any authority. Looking for something to fill in some impact. I was thinking at 80/100 Hz to 250 Hz.
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