How much hum is normal from a new tube amp

@blue-magoo Less than 2 months. Mine so far is dead quiet. But like I said, the demo set I auditioned had faint hum from the amp itself when using the XLR. Finger-crossed it would not happen to mine because I really like the sound of it. 

@auroravengeance 

I really liked mine too, I sent it back today, I can tolerate a faint hum, but I think mine may have had a malfunction. The performance was not effected through. It still sounded fine. 

@macg19 That's pretty sweet looking, out of my budget though.

Hum should only be audible when you put your head about 6" or so from a speaker cone with volume set to your "normal" listening level.

If it's audible from normal listening distance with your volume pot set to where you usually like to listen, something is way wrong.  

Could be grounding issue among your components in the chain, or some problem with the internal electronics of the amp.

I've had two tube power amps with KT150 tubes in my system the last few days and neither had any hum whatsover.