[Hakka]

I have a Rotel RB1070 poweramp for my B&W603 mains. When I power down the system there is a strage whistling noise that decreases in pitch, it starts about 5 second after the amp is switched off and lasts for 3 or 4 seconds. I'm not sure if the noise comes from inside the amp case or if it comes out of the right channel speaker, as the two are side by side, I think it comes from inside the case though.

I've had the amp for about 12 months, I think the noise was always there, I just never got around to working out where it came from.

Sound quality of the amp is fine.

Any ideas on what this could be?

I'll see if I can record the noise and attatch it, its a bit hard to describe what I'm hearing.

Harry.