I have a weird issue that just started. I have a u turn turntable with an installed pre amp. After working without a glitch for about a year, the sound all of a sudden became distant and a little off. I tried multiple things, but when I unplugged one of the white/red 3.5mm AUX cables, the sound went back to basically normal. I can't figure out what I did, or how to get it back to normal without leaving a cord unplugged (which has to be degraded to some extent).