A slight change of topic....
I have a CAV66 and have been annoyed with a hum that constantly comes from it. It is only noticable with a quiet room, ear very close to the speaker, or -very- noticable with headphones.
I finally isolated the amp to having no inputs, one keypad and one speaker on a very short cable to a speaker near the CAV. The hum still remained, I even went as far as to isolate the ground, thinking it was the result of a ground loop, but still the hum remains. I have another issue which is the video sometimes 'breaks up' like it is losing sync for 10 seconds and then comes back to normal. It will cycle like this for a while (15min - 1 hour), which is very annoying. The video issue is very hard to reproduce, it just happens randomly, although I did manage to capture the behaviour with my camera. I have had many theories why this is happening from a cheap DIVX DVD player to an outside camera to the CAV66/MC11 software/media server.
I have ruled -all- these out, my next step is to take it completely out of my house and try it at another location (brothers house). If the problem (hum) still exists, it is warranty time I think.
Can I please ask the other CAV66 owners to try an see if you hear the hum I am talking about. To hear it just select a source like DVD and press pause, then get up to speaker and listen closely for the hum. It is unaffected by the actual volume setting on the keypad, i.e. the keypad could say '0' and the hum remains at the same level. If you have a headphone hookup, it will be very obvious.
I would be very interested in what you report
Carl - sorry for not replying to your email, this issue has been taking up a lot of my time troubleshooting. I will test again when things are stable - right now I only have a bare minimum installed on the CAV