I have a pioneer system in my car. The deck says it is 50Wx4 and I just put an 760W pioneer amp in with a 1000W infinity 10" sub. My fron speakers are 6.5 pioneers and are 220W. The rear speakers are 6x9 pioneer 400W. My systen sounds a lot better with the amp and sub but when I turn it up a lot some songs still dont sound as good since the speakers in the car are a lot weaker. I was looking into buying a 4 channel amp to hook up the rest of my speakers what would you guys recomend and will it all be able to run off of my batery because even with what I have now the lights start to flicker when the amp is drawing a lot of power. I dont know too much about car audio but I did hook up my amp and sub on my own will a 4 channel be as easy to do myself? Thanks for the help.