If after the above mentioned tests to make sure the problem is at the amplifier, the difference in hum probably results from on amp being a different "distance" from the ground (main). That is, the order that your components draw off the line can affect their ground, and therefore contribute to the hum. Equal hum should result from "equal" distance. Play with the order that things are plugged in, and/or cheater plugs (on other components too) to isolate and reduce the problem. GL problems are sometimes very difficult to solve.
Monoblock disadvantage or...?
My friend has QuickSilver M60 tube monos(2 x 12au7 input and 4 x EL34 out tubes).
When I bring my ear to each of the speakers one speaker has bigger hum of 60Hz than the other.
The hum though isn't audiable from the listenable distance.
I've hooked them up with different sets of interconnects but the hum difference was still present.
What I might want to check and how?
When I bring my ear to each of the speakers one speaker has bigger hum of 60Hz than the other.
The hum though isn't audiable from the listenable distance.
I've hooked them up with different sets of interconnects but the hum difference was still present.
What I might want to check and how?