I too have the MR1200. However, I can hear it hum at times; when it starts the hum is not very audible, but it builds up over about 30 to 60 seconds and then fades away. Its most noticeable when I play music at night at low volume and has been somewhat annoying. I mean, why spend on a conditioner to keep the noise out of the stereo components, if its just going to show up in the conditioner, especially considering that the MR1200 has filtering built-in. I wonder if a BC86 III would eliminate the noise.
I've asked BC about this and the response was that I must live in an area where the AC is particularly dirty and/or that the hum may be a product of a major appliance like the furnace cycling on/off at this time of year. I don't recall hearing anything similar with a Monster conditioner, although my system has changed considerably since I switched to the MR1200 (I am very happy with the BC21.1 and BC22 I acquired last Fall).
Gilbert has suggested I have my BC62 power cord retro-fitted with a 'quiet device' and so far I have hesitated. Anybody have thoughts.
Max
P.S. I'm moving to a new house in a few weeks and will have a dedicated line which will be used to plug in the MR1200. This is one of the reasons I'm hesitating about a BC86 or the retro-fitted power cord, as I wonder if a dedicated line will provide stabler/cleaner power.
