Denon x6500 & NAD m28 here. Usually listen to movies at Denon's volume 77-80; listening position about 3,5 meters from the main speakers. Speaker sensitivity 88 dB (Revel f208). Given that peak 2 volts can be achieved at volume 82,5, NAD m28 amps (with rated sensitivity of 1.3 volts) satiate at...