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- 12W, 1-12 in. speaker, tube chassis preamp: 12AX7, power: 2 X 6V6GTA, silverface control panel, two black plastic knobs with silver skirts, (v, tone), black tolex covering, silver grille, mfg. 1970-1982.
The Musicmaster is one of the earliest versions using a phase inverter. Around 1976, the nameplate lost the tail. In 1982, blackface was reintroduced for its final year of existence. This model was replaced by the Bassman 20. Later models may utilize 6AQ5A power tubes.
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- 50W, Yamaha plastic cone non-circular speaker, tube chassis, preamp: 2 X 7025, 12AT7, power: 2 X 6L6, 5U4 rectifier, two channels (bass and normal), silverface control panel, four input jacks (two per channel), seven silver-top knobs (Nor...
- 3W, 1-8 in. speaker, tube chassis, preamp: 12AX7, power: 6V6, 5Y3 rectifier, top numbered control panel, two pointer knobs (v, tone), grey fabric covering, blue-black grille, mfg. 1955 only.
- 200W, 1-15 in. Electrovoice, tube chassis, preamp: 2 X 7025, 12AT7, 12AU7A, 12AX7A, power: 6 X 6L6, new blackface control panel, two inputs, 12 silver-top knobs (v, t, m, b, p, distortion, output level, five-way equalization), black...
- 30W, 2-10 in. or 1-12 in. speakers, tube chassis, preamp: 4 X 7025, 2 X 12AT7, power: 2 X 6L6, 5U4 rectifier, two channels, reverb, front black control panel, two inputs, nine silver-top knobs (Ch. 1: v, t, b, Ch. 2: g, t, m, b, r, v), so...
- 135W, 4-12 in. speakers in a separate cab, tube chassis, preamp: 4 X 7025, 2 X 12AT7, power: 4 X 6L6, solid-state rectifier, two channels, reverb, front black control panel, two inputs, eight silver-top knobs (Ch. 1: g, t, m, b, Ch. 2: le...
- 300W, head-unit with a metal stand, 4-12 in. cabinet that is separate, tube chassis, preamp: 2 X 7025, 12AT7, 6V6, power: 4 X 6550, black control panel, two input jacks, 12 silver-top numbered knobs ( v, t, m, b, p, 5-way equalizer, disto...
- 75W, 1-15 in. speaker, tube chassis, preamp: 4 X 7025, 2 X 12AT7, power: 2 X 6L6, solid-state rectifiers, two channels, reverb, front black control panel, two inputs, eight silver-top knobs (Ch. 1: g, t, m, b, Ch. 2: lead drive, r, l...
- similar to the 75 Combo, except in a separate head and cabinet unit that had either 1-15 in. or 4-10 in. speakers, mfg. 1979-1982.
