I have a KENWOOD excelon KAC-301T amp for sale, it,s 4 channel and pushes out 800+ watts. It has a sliding door on it so that when it gets hot it opens up and a fan kicks on cooling the amp down. Also you can adjust the frequency and all that good stuff. This amp is really awesome, I had it hooked up to my 12'' sub and it hit pretty damn good. 175$