ATX SRT B6,
"'I've tried it with each of my Alpine CDA-7897 and CDA-9855. They sound much better than the stock radio but the amp still sounds bad. There's some kind of limiter too in the amp that clamps the signal when I try to use the EQ and MX features in the Alpines." This !!!! I installed the Alpine CDA-9886M head unit. Fade is completely inop and virtually NONE of the EQ functions are worth squat. Balance and volume are about the only things functional. Friend of mine cut the front/rear splice point at the amp and ran new RCA cables to separate the rear subs from door speakers. Additionally the Sirius/XM and CD volume CRANK. Same volume with the tuner..... WEAK !!! Head unit amp is OFF so the cars amp should be driving the speakers. Will installation of the amp you listed cure any/most/all this/these ??

Tim