Another reason for this, is what I am exploring and I am suprised others arent doing this, is using two Amp Ultras to Bi Amp two speakers; instead of 100 wpc it would provide 200 wpc.
I tried this a month ago and it did not work well. I think the reason may have been as I was using one Amp Ultra to provide power to the left low and right low, and the other Amp Ultra to do left highs and right highs. As soon as the units went to "sleep", they would lose their connection. They would still be in a "group" but the two units would not be working together. It seems from my extensive research, one Amp Ultra needs to provide the right high AND low (even though Id be using the right and left outputs) and the other Amp Ultra would be designated as the left high and low. This creates a "persistent group" I guess.
Anyone do this and have success at keeping the two units syncd (grouped together) after they go into standby?