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

russ69 Details Discussions Posts This discussion Message User 3,573 posts 03-21-2022 at 01:14am Copy Comment URL Report Comment Edit Delete It really sounds like a noisy tube to me.
russ69 Details Discussions Posts This discussion Message User 3,573 posts 03-21-2022 at 02:46am Copy Comment URL Report Comment Edit Delete Thought it was a noisy tube too. Replaced all the tubes and the sound was exactly the same, so that's not the problem. Tubes from Lamm? Some preamps are very sensitive to noisy tubes, even good quality brand new tubes. Sometimes you need to select only the finest low noise tubes and even then you can get one that doesn't work. The sound you describe sounds just like what happen in my CJ preamp. I'm out of ideas unless you have some other tubes upstream?.