dont open your eyes my car sounds good and bass feels good. Currently i have alpine type r 6x9`s rear and the type s components front.with two alpine type r 12 subs running with a soundstream pca2000d 1100W x 1 at four ohm rms , loud and clean. the head unit is a alpine cda9856. The speakers are running off a Soundstream tra 680 watt 4 channel amp which has more than enough clean power to give the speakers. The absolute 1 farad cap also helps feed power to the amp although lights still dim, 1 farad cap isnt strong enough. Performance wise minimal just an aem sri which I guess sounds good but i cant hear much over the speakers.