My setup is BiFROST > LYR > LCD-2
Having gotten the Lyr recently, I noticed that when there is no music playing, there is a faint, static-like high-pitched noise in both channels that appears and disappears periodically at around one minute intervals. Sometimes this noise can be heard in the background of quiet tracks.
I have made sure there are no ground loops, and that the tubes (GE 6BZ7) are seated correctly (I even switched them), and isolated the problem to the Lyr. The noise can be heard without any input on the Lyr as well.
Has anyone experienced this problem before? I suspect it's bad tubes but it's interesting that it's happening on both channels which point to the Lyr itself.
All comments are welcomed. Aside from this issue, I'm really enjoying this setup.