Hi all... I have 2 Klipsch outdoor rock speaker and each speaker has 2 channels. What would be a nice amp to power the speakers? They are 8ohm. Do I need a 4 channel amp? I haver them hooked up to an old Pioneer RXV1400 and they just don't sound good at all. I was going to get new wire and run 14/4 to each speaker which is 80' away from the unit. Any recommendations? Thanks