Well I actually am just going to power them with my headunit's 22x4 RMS (CEA-2006 compliant). I don't have the spare power with my stock alt/bat to power another amp and to get any decent 4-channel it would be expensive and time consuming to install and install distribution blocks. The fronts take 45w RMS and the rears 35w RMS so at least they'll be getting the majority of their power with my headunit. Either way it's an upgrade from factory speakers I have now, with no headunit. I'm just wanting a bit nicer of a system for an everyday listener, not by any means competitions.