What a great sounding unit with plenty of power, but this is the first B&O I've owned with a magical power supply (?) hum that increases in volume as the unit heats up.  The hum does not transfer out the speakers (thankfully) but is a bit annoying.  Anyone out there successfully found a way to eliminate it or subdue it a bit (short of putting the unit in a soundproof box)? Thanks in advance for any advice on this...B

I think it must be the mains transformer that is humming. Apparently the windings loosen a little with age and start to vibrate along with the mains frequency. Newer equipment usually uses toroidal transformers, which are more quiet in addition to other benefits. I'm afraid there's not much you can do about the transformer itself, but you might try adding softer feet under the receiver - I believe this was a factory solution for humming Beocenter 9500s - or placing it on a different platform. Many tables and shelves resonate at the 50/60 Hz, amplifying the hum.

I have an MX2000 tv, which as an old design has a large mains transformer. Now that I have it in a quiet environment, I have to switch it off completely for the night because of the hum...

Oh yes, and welcome to Beoworld! I tried to reply to you already yesterday, but apparently forgot to click "post"...