I am running into some issues with my LAMM L2.1 Reference Preamp and was hoping someone here might know of a technician who has the knowledge to work on a LAMM preamp. Given it is unclear when LAMM (the company) will re-open for service, I am reaching out to this group for any advice/recommendations/help. My preamp is doing 2 things (potentially related but I don't know):
1. It seems to be sending higher than usual DC to my power amp which is causing the monitoring circuit in my power amp to blow its fuses (or if it does not blow, blinky lights come on telling me DC is higher than the expected range but not high enough to blow the fuse). This occurs during operation (anywhere between 10 mins and 1-2 hours after power on). I believe the preamp is the culprit because when I swap out the LAMM with my passive EMIA preamp, the issue goes away.
2. The sound starts to smear slightly (and bass gets boomier) after an hour of operation. Again, when I swap in my passive preamp, the issue goes away.
I tried putting in newer tubes but the problems still persist so I suspect it is not a faulty tube issue. And there no DC offset calibration that I can find in the user manual.
I know it might be a stretch, but if anyone knows a tech who is knowledgeable (on LAMM products), please let me know. Hoping to fix the LAMM because when it is working, it sounds wonderful (so natural sounding). Thank you!
1. It seems to be sending higher than usual DC to my power amp which is causing the monitoring circuit in my power amp to blow its fuses (or if it does not blow, blinky lights come on telling me DC is higher than the expected range but not high enough to blow the fuse). This occurs during operation (anywhere between 10 mins and 1-2 hours after power on). I believe the preamp is the culprit because when I swap out the LAMM with my passive EMIA preamp, the issue goes away.
2. The sound starts to smear slightly (and bass gets boomier) after an hour of operation. Again, when I swap in my passive preamp, the issue goes away.
I tried putting in newer tubes but the problems still persist so I suspect it is not a faulty tube issue. And there no DC offset calibration that I can find in the user manual.
I know it might be a stretch, but if anyone knows a tech who is knowledgeable (on LAMM products), please let me know. Hoping to fix the LAMM because when it is working, it sounds wonderful (so natural sounding). Thank you!
