I was given 2 Marantz MA500U amps. I have a decent surround system, but don't know how to integrate the amps into it. Do I hook them into my receiver(Yamaha RX-v2700) or into 2 of my speakers? If I hook them to the speakers, are there power requirements I have to abide by? I am clueless on this and could use some expert advice. If you've hooked these amps into your system, please tell me how.