So I have upfraded my receiver from sony 1200es to integra 30.3 but I think the soy went much louder. Yes the integra is a superior sounding machine but not loud enough. For movies its acceptable , but in stereo it just seems to max out so quick. Do I need a power amp to aid my receiver? Can my old sony aid as a power amp? Which power is affordable that can work well here? I use supra cables and wharfedale diamond 9 speakers, bi-amped with a energy s10.3 sub. I want more power pls help! Thanks guys.