A couple of times with each of my last three AVRs I've gotten "lost" and turned something on (mostly) or off (a couple of times) that has caused it to sound really bad. On my current one, a Yamaha TRS-7810, the "Expander" on Net radio made it sound awful. I kept saving the "Scene", but it didn't seem to stick until I did the first firmware update Yamaha put out after I got it. No more "expander", and I'm happy now.