Tube amp buzz (amp, not speakers)


Hello - 

Almarro a318b makes buzzing sound at random: sometimes it does, sometimes it doesn't, completely unpredictable. The buzz comes out of the amp itself, like a transformer buzz; the sound out of speakers is completely clean. 

I'll appreciate any ideas - what causes it, what to do?
boriso

Showing 2 responses by tuberist

I used to own that amp. Holographic sound for sure. I always got a system "hum" when switching it on, even with a dedicated line and a power conditioner. Occasionally a transformer would buzz and I'd just unplug the unit and power up another time. I owned the Almarro about 3 years.
Boriso,
Holographic IMO means spatial characteristics where the instruments and voices are clearly delineated. If you go Emotiva you will regret it if you value those traits I described. I found the Almarro easy to tube roll by swapping out the 6SN7; the 6SL7 not as much. It was a fun amp but the biasing was tedious and somewhat dangerous.
regards,Larry