Also, has anyone with the GE 6BZ7s noticed a very faint high pitch noise being made that can be heard when no music is playing? It doesn't change loudness along with the volume control; it's just a constant noise. I do not notice this with the JJ's. I've noticed this with all headphones I've tried.
Edit: I think these tubes may have gone microphonic. Even a very faint tap on either of them sends a noise into the headphones. It's either just a trait of these tubes, or they are defective.
Edited by jsplice - 8/22/12 at 9:40am