Hey guys just lettin' ya' know that I hooked up a Sony 600W 4 channel amp to som Lightning Audio 6"x8" (yay wal-mart) & it sounds way better than stock. The top end isn't great but, the Sony Xplods that are on a UPS truck right now should take care of that. I still have a stock HU. I just replaced all of the wiring from the HU plug to the amp & then (obviously) ran wire to all 4 speakers. 16g Monster Wire. See ya'll later.