Could be a cold solder joint.
Could be a dirty corroded tube socket female contact(s). Coupled with poor contact pressure between tube socket female contact(s) to male tube pin(s).
Squeaking/Paper Crinkling Noise Coming from Lamm LL2.1
Can someone suggest what the problem may be? Hearing noises in quiet passages and with no source playing through my Lamm LL2.1.
Noises are equal in both channels. I've swapped out all the tubes. Replaced the cables. Still happening. Doesn't change with volume level.
Ugh. Lamm is so bad with repairs.