Bryston 7B ST - Sounds anaemic. Any help?

Sounds like a faulty unit. Check with Bryston; they'll probably suggest you send it in. Bummer to be without it for a while, but at least you've got the 20 year warranty.

Other possibilities: some kind of impedance mismatch with your preamp or whatever is in the signal path immediately in front (unlikely). Suboptimal setting of the current/voltage switch in the back -- try flicking it the other way and see if the sound improves. Also, it may not be sufficiently broken in (unlikely). Gook luck.

Dear Nanning,
I have observed the same noises with my 7Bs. I agree with PBB that it is probably from capacitors discharging. It is disturbing but not damaging. There are ways to prevent these sounds, but obviously this was not done for our 7Bs. I am happy not to pay for extra circuitry. I left my 7Bs on virtually all the time anyhow.