question for Luxman L-590AX owners

I own the subject amp, have had it for 3-4 years. I recently noticed a low hum or buzz coming from the amp itself (not the speakers), and would swear that it has been dead quiet up until now. You have to have your head right down beside it to hear it. I'd like to hear what other owners have to say. Are your amps completely quiet? Seems like I may have developed an issue. Thanks in advance, and Merry Christmas.

builder312-25-2020 1:48am

53 responses Add your response

erik_squires Details Discussions Posts This discussion Message User 16,056 posts 12-25-2020 at 05:58am Copy Comment URL Report Comment Edit Delete This often happens to any amp's transformer when DC enters the line. Did you recently move a PC, or add a dimmer switch somewhere??
imhififan Details Discussions Posts This discussion Message User 2,181 posts 12-25-2020 at 05:42am Copy Comment URL Report Comment Edit Delete Any dimmer light switch installed recently? Low-level DC voltage sitting on your AC power line can causes the power transformer to hum or buzz.
jjss49 Details Discussions Posts This discussion Message User 6,612 posts 12-25-2020 at 05:09am Copy Comment URL Report Comment Edit Delete i don't own the luxman unit but have had this problem hum can be caused by low line voltage, among other things, so it can come and go...