well, the speakers aren't really made for any kinda of bass (midbass if any at all).. and im pretty sure that rockfords are quality amps.. the distortion may be caused sending too low frequencies to the speakers. maybe you should try and play with the crossovers in the amp to filter out the lower frequencies. you will lose the small amount of bass that you have now, but it should scream nice and loud... and then you will be ready to get an 18" in your ride... haha.. hope it works out

95 RS Eclipse (Vega-ed Out)
Greddy Exhaust || Greddy Headers || Iceman CAI || NKG Sparks || Magnacore Wires || 16" Enkei Rims || 2" Progressive Drop || Ingalls FR Camber Kit || B&M Short-Shifter || Altezza'a (center painted)

AUDIO/VIDEO-
Pioneer DEH-P7200 || 4" LCD screen (passenger visor)|| DVD Player in trunk || 1" Cerwin Vega Tweeters || 6.5" CV speakers in the doors || Custom fit 6x9 CV in the back panels || 15" CV Stroker in custom made box || MMATS D300HC amp (for the sub)|| MMATS LM4065 amp (for the rest) || ALL CUSTOMED AND DUN BY ME! HEHE

SOON TO COME (WEN FUNDS ARE MET)
Stage II turbo kit (HRC or Star, ne suggestions??? ¦Þ)|| Much needed suspension upgrades || Kits.. Rims.. Money..??? || Pioneer AVX-P7300DVD (indash dvd/screen)|| Pionner AVM-P9000R (gotta have that DTS)