A) If using plywood or MDF for your cabinets, the thickness of your raw sheets should be a minimum of 1".   There is one exception when using the 15" Acoupower Driver, as the thickness at the cut out must be 0.75" or less.   The baffle can be thicker again at another 4" or so in diameter if desired.

B) Very strong bracing is absolutely required for higher power applications and recommended for all others.

C) Be very careful not to place fill anywhere near the back of an Acoupower Subwoofer driver.   The drivers will ingest and shred ANY material....fiberfill, fiberglass etc.   No damage will occur to the Acoupower driver, but you will have a horrible mess on your hands.  

D) Passive Radiators: Keep in mind these drivers are so powerful that they overdrive radiators quickly in any kind of standard configuration.  If you really want to use passive radiators, we recommend (2) long throw 24" radiators per 18" driver, and (2) long throw 18" passive radiators per 15" driver.  

E) Relatively small sealed boxes of approximately 3.0 Cu.  Ft.  work very well with our 15" driver.  

F) Vented and bandpass systems work very well with both drivers.

G) When used with a medium size (5 Cu.  Ft.) vented box, our 15" Subwoofer can be used to provide in room responses with -3dB points below 20Hz.

H) For a super tight, rock solid, powerful bass is smaller clubs or bars, a single 18" in 5-6 Cu.  Ft.  is awesome.   Just make the box VERY strong!

I) For maximum output applications, multichamber bandpass enclosures are best.   See the Genesis device for more information.