Your not gonna believe this but the new little pioneer flat sub is amazing sounding. im the number 1 hater of pioneer speakers but some of there new stuff is very impressive. im a believer now.I've installed about 15 or 12 of them in custom enclosures and each time im supprised.

The new Kenwood Excelon kfc-xw1200f subs are quite good for a shallow mount woofer.