i have a 15" RF punch HX2 in a 2.7 cubic foot box, powered by a kicker kx400.1 (480 watts) and a pair of polk MOMO 6X9's amped (about 100 watts to each), and my friend says his guitar amp is louder... 55 watts to 2 12" speakers. he hasnt turned his up all the way, but says his is louder, can anyone vouch for that or what do you guys think?