Increased buzz on OD channel

[thephantum]

Did you purchase the amp new or used? If it was new, did it have the problem right out of the box?

[RonVermillion]

I had something very similar to this happen to me some years back, on a NOT Blackstar amp. It drove me crazy until I accidentally found out that i had a problem with a power strip. Sometimes I would use it, sometimes not. Did not put 2 and 2 together until one day I just let it buzz and went around trying to wiggle and change things and I accidentally picked up the power strip. Just jiggling it around made the buzz come and go. It was an inexpensive power strip, so I deep sixed it and got a Monster power strip and no problems since then.

Ron