FB,
I left out something important. I had gotten a EMI filter from Alan Maher early on and still use it. It is a little plugin black box that cost a little over 100 some years ago. It has a little circuit board in it that is supposed to clean up the power lines and the room EMI. I found it to clean up the sound quite notably.
Also, I started out with some of his little boxes of crystal rock that is treated somehow. Apparently they act as little semi-conducters, pulling noise off the wires in the house. I got 4 for 100 and put two on the mains lines coming into the house, one on the circuit breaker for my music, and one at the outlet for the audio. These were notable too after they settled in a day.
Later I got a schumman resonator unit from KEMP (200) which also made a notable change in cleanliness and sound stage.
So the brickwall and these really cleaned up my sound a lot.
Have you checked out
http://bluecircle.com/index.htmlI almost got a "thingy" once or a "sillycone" filter. There was a Positive Feedback issue some years back that reviewed a bunch of cheaper power cleaners, and I found Blue there.
You can reach Dave at dgelledges@msn.com