GK MB Fusion -- Annoying hum!

[ddbassGA]

I've had my GK MB Fusion for almost 3 weeks and have been loving it. BUT today noticed a very annoying hum that will be a killer. It happens with no instrument plugged in, even in the mute position -- and it increases with the final gain control. Must be something in the final power amp stage. Anybody out there hear anything similar?

So it's going back. Now, replace or refund? That is the question.

[bwoodman]

Mine crapped out too - first the blue light, then it went to static - in the shop now - good thing it has a 2 year warranty - after the repair, I'm selling - done with GK amps crapping out - I've had several with issues. If I could get a refund, I would do it. Replace? I wouldn't.

[ddbassGA]

I think that made my decision on the GK vs GB that I've been wrestling with.