Due to crackling in the master and treble controls, this item is being sold as semi-junk. Guitar amplifier sold in the mid-70s. This model is rarely seen on the market. It was overhauled once, but has been stored for a long time, so there is crackling in the master and treble controls. The reverb also seems weak. Sound output is okay, and it can be used if fixed. Please purchase with the understanding that this is the case.