Originally Posted by kriktsemaj99
^ You only have 7 amps in total. e.g. 7.1 in the main zone, or 5.1 + zone 2. There are no extra amps for zone 2.
At any given volume level you are not "running extra power" to the speakers by bi-amping. And since the AVR is simply doing passive bi-amping (sending the full signal to both sets of inputs on the speakers) it's hard to see how it could make a "noticable" difference. You would have to do a blind test with careful volume matching (using an SPL meter) before concluding you can really hear a difference.
Biamping with an AVR to get better sound is myth, marketing and a waste of time.