Fender Music Master Bass Electric Guitar Tube Amp (not Vibro Champ Princeton Reverb Blues Jr Junior Pro)

Great condition awesome player. Has the fabled “Harvard Mod” and upgraded guitar speaker which has transformed it into an amazing little tube amp for guitar use. Great tube breakup at bedroom levels. Quieter than a Princeton. 12” speaker provides better bass response than most small amps (Champ series, Princeton, etc.) Perfect bedroom practice and recording tube amp. Very unique and a good talking piece. “The Harvard mod involves rewiring the tone circuit to mimic the layout of a Fender Tweed Harvard (5F10) for better guitar tone, improving the control range and gain, often alongside safety/reliability upgrades like adding a fuse, 3-prong cord, and replacing capacitors. Key changes include reconfiguring volume/tone pots with specific capacitor values (like .005uF, .02uF), potentially adding a shielded wire, and sometimes upgrading the speaker for a richer sound, transforming it from a decent bass amp into a versatile guitar amp.”

Condition

Used (normal wear)