Flemke and Cornfed are right in my opinion. Try to get the old type screw in ceramic fuses instead of circuit breakers. These things are reported as noisy.
Do power conditioners really help?
I am a thinking about a purchasing a power conditioner for my system but really don't know much about power conditioners. I have a Denon AVR 5800 home THX with B&W Nautilus speaker set up. I'm also thinking about purchasing a power cable. I am currently using the Denon factory cable. If I buy a good power cable do I need a power conditioner? I'm clueless and wondering if I will hear any sound improvements. Prices I've looked at range from $30 to $2000. If I purchase, used or new, I only am willing to spend $300-$500. Comments welcome.