1972 Marshall JMP PA 20 guitar amplifier head, made in England; together with matching 1 x 12 speaker cabinet (requires minor servicing, please see condition report)
The amplifier powers up and makes sound, although intermittently causing a squealing noise and would therefore require servicing. The owner had mentioned that the amp is in need of servicing due to a fault that he could not rectify by himself. Its thought to be a valve of capacitor issue. Please see images for general guidance.