Audioholics did a neat setup with a Yamaha receiver, two amps and eight Axiom speakers (two center channel speakers).

http://www.audioholics.com/productreviews/loudspeakers/AxiomAudioM80tiEP600p1.php

Could this same setup be done with a 990/7700 combo without the additional amps? The two center channel speakers has me stumped.

Thanks