I recently bought one of these based on fellow tbers feedback, and figured id give it a try. The first one was defective as it had a screaching vibrating noise when playing in certain areas of the neck. Store i bought it from contacted a peavey rep and he actually went out of his way and got me a new one and even dropped it off at my house. Very nice and very thankfull i was. But my new one is doing the same thing, not at the screachy level of the first one. But at any volume there is this constant vibration of noise behind evey note. I imagine in a band environment it wont be noticed but while playing it at home it is. I talked to Bby Bld and hes given me great pointers on the amp and such, and i do love the sound of this amp. Its very loud and has a great tone to it. The built in tuner is a little eh but by far an excellent amp for the price. But has any other owners run into this problem with it? I dont even think its the grill, sounds like the amp section of it is actually whats causing the vibration.