I recently bought a Pro Bend bandpass box off of ebay, got the box install my subs (which are some older fosgates 12s 100w rms) now the problem that i have is that the bass isn't really that deep nor loud. So i'm thinking that i have too much airspace, is there anything that i could do to the box or will i have to go out and buy a new box. thanks for any help

 

Go out to Walmart and get yourself 2 bags for polyfill for $4 total. It is pillow stuffing, found in the sewing section. Stuff it into you're boxes, to the point where it almost touches the sub. It can help out greatly, and worth the $4 to try. Good luck.

 

they're the old Punch 12s? i'm not sure if they're design for bandpass enclosures. that might be your problem there.

 

You should have just built a real box instead...Bandpass is for suckers. They are called one-note wonders for a reason. And those subs won't work great in there anyways. Do more research before you buy next time.

 

just sell that bandpass box, use that money to buy/build a nice sealed/ported box. i'm sure you'll be more happy.