[Formerly YB-2]

Originally Posted by ctzzzz

I own an A70 but considering switching to AB class P7300.
The known data are:
1. I have a pretty big listening room, 73 sq meters (about 700 sq feet).Maybe more power would be better suited to the larger room (even I usually don't turn up the volume too much)

Originally Posted by ktliao88

My room is 550 sq feet and listening distance is about 3 meters from seat to speakers. With P7100 it is good enough to support any type of music.
However, when play at high volume over 85 dbA, I can feel deterioration of sound quality. Guess this due to the characteristic of AB type amp.
For 700 sq feet big listening room I would recommend mono mono amp or bridged.

Both of you have big listening areas. Would guess that both of you are running out of power to fill those spaces.
Think ktliao has the answer in going to monoblocks.