For your consideration, an ultra rare 1967 Plexi JTM 100 Super PA "Black Flag" head, that someone threw the kitchen sink at in the '80s. All of the input jacks except the first hi/low set have been disabled. It has an added gain stage and a first master volume that is after the tone stack. The second master volume is post phase inverter, and is activated via pull switch on the knob. The FREQ knob changes the value of the treble capacitor. It has a preamp line out with a level knob on the back. The transformers are original. If you're looking for high gain '80s modded Marshall madness, this thing sounds GREAT. If you want to restore an ultra rare amp to its former glory, the bones are there. Your call!