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.

dhcod03-21-2022 12:44am

dhcod OP Details Discussions Posts This discussion Message User 710 posts 03-21-2022 at 03:03am Copy Comment URL Report Comment Edit Delete Very low noise tubes from Brent Jessee. Also, there's no way if I replaced all the tubes even with less low noise tubes, the exact same sound would be coming out. Something would change. No other tubes. Just Herron M1A monos. Can it be some other electronic component like a capacitor?
jea48 Details Discussions Posts This discussion Message User 4,612 posts 03-21-2022 at 02:09pm Copy Comment URL Report Comment Edit Delete 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).
imhififan Details Discussions Posts This discussion Message User 2,217 posts 03-21-2022 at 05:32pm Copy Comment URL Report Comment Edit Delete Noises are equal in both channels. Could be the power supply, since both channels are sharing it.
joey_v Details Discussions Posts This discussion Message User 668 posts 03-22-2022 at 12:16am Copy Comment URL Report Comment Edit Delete Call Lamm and see?
bigkidz Details Discussions Posts This discussion Message User 3,413 posts 03-22-2022 at 12:56am Copy Comment URL Report Comment Edit Delete yes call Lamm like Joey_v says. Clean the tube socket and tube pins. Can be a capacitor or bad solder joint like mentioned above.