Reverse the tubes - and see if the sound follows the change or remains constant. Reverse the small tubes first - if the left channel is still a bummer, try the power tubes next. If that doesn't help call VTL. I have amps which hum a bit, but its the same in both channels - so if its not the tubes it may be a bad part in the amp which needs to be replaced.
Tube Amp Hum
I have a new VTL ST-150 for about two weeks now. Its breaking in nicely, but one thing I notice with this amp is a slight hum through the midbass drivers. Not audible from the listening position, but there nonetheless. I have the amp on a dedicated 20 amp circuit which was quiet as a mouse with the SS amp that was on it before this amp, which eliminates it being a ground loop. Also, all tubes are all seated properly.
So my question is, is this a normal operating characteristic for a tube amp? If so, does it have a degrading affect on the sound? I would like to hear just pure air when my equipment is on like I had before if possible.
thx!
So my question is, is this a normal operating characteristic for a tube amp? If so, does it have a degrading affect on the sound? I would like to hear just pure air when my equipment is on like I had before if possible.
thx!
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- 15 posts total
- 15 posts total