Here we have a vintage Marshall Reverb-Fuzz Unit from circa 1970! This was made in England, and by all accounts is pretty rare. This small head-sized effect unit has been serviced by Chris Benson of Benson Amps. Repairs performed include fixing the original reverb tank to preserve originality, replacing a few leaking capacitors, rewiring to 120v, installing a US power plug on the original cable, and installing a relay bypass to correct oscillation and impedance issues from the audio signal running through the unshielded footswitch cable.

The unit is in very good shape cosmetically with light wear and patina on the exterior. The original footswitch is included and shows signs of use. The fuzz effect is pretty solid, essentially a Marshall Supafuzz circuit. The reverb effect is a bit weak, and a new tank may improve that, but we opted for originality. When engaged, the volume drops a bit from the amplifier’s normal level versus when the Reverb-Fuzz is bypassed. The original design probably needed improvement, but overall this is a very cool piece of Marshall History with a neat sound!