Laney amps are good, used to have one and wish I still did. It sounds like a loose ground to me,, but you should take it a shop. you may have what phoil said a mad earth ground. have you tried it in a different plug? or at a different house? ask your neighbor if you can test from a room at his house and see if you get that buzz. All else take it to a shop and have both checked. Is your cable in good shape? that could cause noise also.
Mal - Well, lady, I must say, you're my kinda stupid.
Mal - Jayne, your mouth is talking. You might wanna look to that
Kaylee - No power in the verse can stop me. BOOK- you're going to burn in a very special level of hell. A level they reserve for child molesters and people who talk at the theatre.