do you have a phone app that can measure spl? how loud is it? with those speakers you should get pretty loud at 75% max volume. probably too loud. I need to have master volume around 50% for low level listening, think thats normal...50 watts should be fine for normal listening in normal size rooms with your speakers.
Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5, Magnepan LRS
Subs: Rythmik FV25HP, Rythmik FV15HP