This is a custom-built Amp built from a 68 Silver face fender Bassman head. It uses a Hoffman 5F6A turret board but has been changed to a Marshall back end. Has EL34 output tubes and a obsolete electronics Plexi 50W output transformer. It has the Hoffman hot switch installed which will either set a normal 5F6A preamp or when enabled cascade the two original channels together. It is a monster with the switch on.