I recently bought a JCM 800 Studio Classic SC20H. I have taken in to practise twice and inbetween songs when i am not playing a loud crackaling comes out of the speakers (I have changed all cabels, speaker cable guitar cable power cable) and it still happends. but if i play for a while it seems to disapear then randomly come back when i stop. if i put the amp into standby it goes.
anybody have any ideas?
As the unit is still under warranty we would recommend that you take it back to the dealer, so it can be checked over it may be a pre amp valve breaking down causing the crackling but we would recommend having it checked over.