In addition to the above mentioned, does a cable TV box share the same outlet or AC line? Also are your interconnects unshielded? Is your preamp tube or solid state? I purchased a new tube rectified preamp a while back to use on a solid state power amp and I was never completely able to eliminate low level hum, only reduce it but it sounded good enough to overlook. If overly concerned you may want to contact VTL in California. Congrats on your new VTL amp, an excellent choice!
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!