Okay, I have the two rca cables off the head unit back to my 4 channel amp which is now powering my front speakers and my subwoofer with the rear channel (until I can get a second amp for the sub). I had the rear speakers directly wired to the amp, but disconnected them to hook up the subwoofer. Can I reconnect the rear speakers back to the direct output from the head unit. Using the head unit to power the rear speakers? Help, Please, and Thank You! Mike