The only moving of the preamp has been to move it to a separate shelf by itself (no discernible difference). When I connected different amp, they were about 3' apart. No difference then either.
This morning, I put a metal widow screen behind the stereo to act as a shield, hoping the noise was coming from that direction. It was a no go.
This morning, I put a metal widow screen behind the stereo to act as a shield, hoping the noise was coming from that direction. It was a no go.