[JTF]

Do the H or W frame designs play a role beyond structural stability? Can the dual sub kits be built as plain flat baffles with support in the back? Maybe in a U configuration with a flat front and support wings on the sides in the rear. This is purely an aesthetic and WAF consideration.

-Jon

[emailtim]

Do the H or W frame designs play a role beyond structural stability?

- Yes, they extend the effective baffle width keeping the front wave from cancelling the back wave.

Can the dual sub kits be built as plain flat baffles with support in the back?

- See this for more information - https://www.hifizine.com/2012/12/subwoofer-origami/

Maybe in a U configuration with a flat front and support wings on the sides in the rear.

- See the preceding URL.  The H-Frame has a figure-8 radiation pattern.  The U-Frame has a cardioid radiation pattern.

[JTF]

Thanks for posting that link

[Danny Richie]

And by separating that front and back wave, with the H frame or W frame side wings, the lower range is extended as well.

You can do it with a U shape frame as well, but it puts a LOT of pressure in the rear chamber and needs a LOT more bracing, structural support, and resonance control.