Have an alpine cde136. have a kenwood KAC-8405 600 watt 4 channel amp. Kenwood runs 2 jl C5 650 components (front) and 2 rockford t1 components. Have 2 JL HD 750's running 2 JL W7's. Clipping occurs from the Alpine at a volume of 29 out of 35. The system was set with an o-scope. I gains were set by audio shop based off clipping at 29. The hd amp gains are set at 50 percent. I feel like the speakers, and subs could handle a smidge more power, or speakers themselves could have a louder cleaner sound. What would anyone suggest? Should I get a better head unit? or a better amp to run speakers. Subs are probably cool, because they are pretty **** loud. Any input would be appreciated.