Well I am coming from a different angle as I have a aftermarket HU in my Jeep already with a TON of wiring to sift though. If you want to power everything, you do need 5 channels. A channel for each speaker. Now I am not an expert, but I tend to do things at a high level, if I can. That being said, there might be other ways of doing this. I might hire a pro on mine. I just haven't looked at it long enough as it is never here!!!! Sorry, I am just wanting it home. Anyway, I don't think your HU will be enough for you and the amp you posted is about the same price as the 5 channel I posted. I haven't done enough research to really give a more solid opinion however.