Thanks again everyone for their suggestions. Some more work tonight/tomorrow night its seems

Originally Posted by NutFlush
[quote=markg]

Mark,

a few follow up questions:
- did you have an active sub (or any other active speaker = power plug!) connected to your amp? If so: what happens if you disconnect it?
- what was the effect when BOTH amp & Oppo were connected to the SAME power board (including twisting one of the 2 power plugs as a second scenario)?
- do you have a power cord WITHOUT ground (meaning only 2 pins but no other metal parts that connect to any part of the socket)? If so: what is the effect if you try it on the OPPO (or amp)?


The sub was not plugged in - in fact, I have not had it plugged in since I got the Oppo.

It is worse when both Oppo and Amp are in the same power board and it is worse when there are just the 2 of them alone (i.e. more components = reduced noise level). I have not tried twisting.

I dont think I have a cord with 2 pins that would fit the 3-pin IEC socket on the amp and Oppo.

I will try an optical connection on the Set Top Box to see if that helps. I have a spare cable. I will also try unplugging the antennae - I did do this last night but don't recall the exact time when I did, but it didn't help.

568.2mm, M80