dweller,
I have a Ray Samuels tube head phone amp, and also a Herron Audio preamp that demonstrated hum issues until I changed the wall outlets , new industrial grade outlets ($5 per) solved the problems for me. Might be worth a try for you
I have a Ray Samuels tube head phone amp, and also a Herron Audio preamp that demonstrated hum issues until I changed the wall outlets , new industrial grade outlets ($5 per) solved the problems for me. Might be worth a try for you