does anyone T/A walls?

[The Camry]

I've seen subwoofer walla that aren't just flat behind the driver. I'm referring to the ones where there is like 8 behind the driver. 4 directly facing another 4. Kinda like

=} {=

=} {=

=} {=

=} {=

(p) (d)

{= bring subs (p) being passenger. (d) being driver

Since you want them all in phase and the rear and front sub can be more than a few feet apart. Wouldn't you want them in phase to take advantage of the 3db peaks that come from in phase frequency? Thus using T/A to accomplish that?

Also. Are those types of wall set ups wired with opposite polarity of each other? Wouldn't have them all in the same polarity create instant cancellation?

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[GPcarAudio.com Pro Seller]

If the drivers and soundwaves are controlled VIA 4th order it works, if its an attempt for a normal ported design, there will be cancellation 9 times out of 10

 

[The Camry]

If the drivers and soundwaves are controlled VIA 4th order it works, if its an attempt for a normal ported design, there will be cancellation 9 times out of 10

I've also seen them at 45 degree angles as well. That I could see the subs not cancelling but reinforcing each other. Wave functions or weird.. Still I wonder if there is a point where adding woofers starts to make your wall quieter. People throw in and wire up 8 12s and never test to see if they are losing spl.

Chances are I'll never build a wall but if I did. And it was at angle. I'd def only add one driver and cut one hole at a time. Playing with phase, polarity and even T/A to achieve the highest spl. Doing that process one by one till all drivers have a hole cut and its bada$$

 

[audiobaun 5,000+ posts]

LOL..Never crossed my mind to T/A a wall setup..Interesting

 

[mlstrass 5,000+ posts]

On my 4th order the front 4 subs were phase delayed, gained .7 doing that. But my baffles are angled to help with phasing issue, so I didn't expect a huge increase. 10 15's with 5 subs on each side....

 

[mlstrass 5,000+ posts]

I've also seen them at 45 degree angles as well. That I could see the subs not cancelling but reinforcing each other. Wave functions or weird.. Still I wonder if there is a point where adding woofers starts to make your wall quieter. People throw in and wire up 8 12s and never test to see if they are losing spl.
Chances are I'll never build a wall but if I did. And it was at angle. I'd def only add one driver and cut one hole at a time. Playing with phase, polarity and even T/A to achieve the highest spl. Doing that process one by one till all drivers have a hole cut and its bada$$

How would a wall designed for 8 subs (as an example) work with 1 installed at a time??? Volume and port area would be off the wall wrong....

I do agree that there is a point when more subs becomes a trade off for getting loud, but for demo set ups the majority of the time having more motors to take the power is a good thing...