OK, I'm totally puzzled. I need some help figuring out a rather unusual (in my opinion) noise from my Denon AVR 3801, which is hooked up to a whole arsenal of Polk speakers.
Basically, here's what's happening: At high volumes, during breaks between songs, I'm hearing a strange whirring noise from the Denon AVR 3801. It sounds kind of like a VCR rewinding. This only happens at volumes exceeding minus 8 below the zero threshhold db on the AVR 3801. What I THINK is happening is that the AVR 3801 is running pretty hot, and a fan in there is switching on to cool the unit. Questions: Is this normal at high volumes for the 3801? And if so, am I doing any damage here? I want to emphasize that everything sounds really clean and nice, even at the point where this fan or whatever the hell it is starts coming on. It's really weird.
I hear this between songs on any of my CD playback players. I've definitely isolated it to the 3801 -- the noise is coming on between songs on the CAL CD player, at high volumes. It's not a bothersome or annoyong noise -- just a whirring, like I said.
I'm probably going to call Denon next week during business hours, but in the meantime, I just want to make sure I'm not toasting my receiver. BTW, the front speakers -- old Polk Monitors 10B -- are running off my Adcom GFA-555, so the Denon is getting some help.
Any of your thoughts would be appreciated. There are some users of Denon on this board who are very knowledgeable, so I'd appreciate your ideas.