I never had this happen with my Aleph 3. I did have mechanical buzz from other components (Wadia 830 and JJ 828), and in both cases, it was the power transformer. I agree with Ghostrider. Whatever it is, will probably require factory servicing if you can't / don't want to live with it as is. If you are a good do-it-yourselfer, you may be able to replace it, but you would still need to contact the factory to buy the part. I have not heard anything bad about Pass Labs service department, and vaguely remember hearing good things.
Aleph 5 - buzzing sound when hot?
I just acquired and Aleph 5, but I have noticed that as the amp gets progressively hotter (after say 3 to 4 hours) of use, the amp start to make a buziing sound, which gets progressively louder with time. Is this normal for Aleph amps and if not, any ideas what it could be \and what I should do about it? The sound is definitely from the amp and not through the speakers.
Thanks
Thanks