I picked up a well used Music Master cheap on ebay and decided to improve this under-rated practice amp from the ‘70s.
Although originally sold as a Bass amp it has built a small following of guitarists who tweak it for use as a guitar amp. Versatility is not this amps thing – just 12 watts of 6v6 powered tubey goodness.
It’s a simple amp design – a bit like a Champ but with a 12” speaker.
The standard mods are well documented here. Essentially to tweak the Volume/Tone circuit to mimic a Fender Harvard, the coupling capacitors to fatten the tone, and replace the original crappy speaker.
The amp that I bought came all original, including valves, so I also replaced them with TungSol 6v6s.
Sprague Atoms - expensive but good.
Speaker was replaced with Jensen P12Q Alnico.
I have not got round to recording a demo yet, but you can hear a stock model on youtube with single coils.. sweet bedroom amp.