I have a Marantz 2275. At low volume the channels distort, the sound weakens and sometimes one or the other channel will cut out completely. If I turn the volume all the way up it will restore lost sound to the channel that has cut out (both channels do it) sometimes the volume on one channel will get weak while the other channel cuts out completely. There is also crackling and popping sounds sometimes. If I leave the volume a little higher than low the unit works fine. No channel cutting out or weakening sound.
Anybody have an idea what it is. I thought about replacing the main caps (55v 1300 uf!