No. of Channels
Two-Channel
Amp Type
Tube
Inputs
Five inputs (four inst., one mic)
Outputs
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- 25W, 1-15 in. Jensen speaker, guitar/bass combo, seven-tube chassis, preamp: 1 X 6SJ7, 2 X 6SC7, 1 X 7025, power: 2 X 6L6, rectifier: 5V4, two channels, rear top-mounted control panel, five inputs (four inst., one mic), four knobs (Ch. 1 v, Ch. 2 v, b, t), brown mottled leather covering, brown speaker grille made up of six vertical slats in a circle pattern, "Gibson" logo on upper right corner, 1,247 shipped, mfg. 1950-55.
Later models used a 12AX7 in place of the 7025 in the preamp section.
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- 18W, 2-12 in. speakers, guitar combo, six-tube chassis, preamp: 2 X 12AY7, 1 X 6SC7, power: 2 X 6L6, rectifier: 5V4, two channels, top rear-mounted control panel, four inputs (two per channel), five knobs (Ch. 1 v, Ch. 2 v, b, t, power),...
- 50W, 2-10 in. standard speakers (GA-77RET) or 1-15 in. JBL optional speaker (GA-77RETL), guitar combo, nine-tube chassis, preamp: 3 X 6EU7, 2 X 12AU7, 1 X 6CG7, power: 2 X 6L6, rectifier: 0A2, two channels, tremolo, echo, front white cont...
- 50W, 1-15 in. regular speaker (GA-77RVT) or optional 1-15 in. Lansing speaker (GA-77RVTL), guitar combo, eight-tube chassis, preamp: 4 X 6EU7, 1 X 12AU7, 1 X 7199, power: 2 X 6L6, rectifier: 5V4, two channels, tremolo, reverb, top/front s...
- 30W mono (2 X 15 Stereo), 2-10 in. Jensen speakers, stereo guitar combo, eight-tube chassis, preamp: 4 X 6EU7 power: 4 X 6BQ5, solid-state rectifier, two channels, tremolo, top silver control panel, five inputs (four mono, one stereo), si...
- 25W, 1-15 in. speaker, bass combo, five-tube chassis, preamp: 2 X 6EU7, power: 2 X 7591, rectifier: 5AR4, single channel, top silver control panel, two inputs, three knobs (v, b, t), brown covering, light brown grille, 493 shipped, mfg. 1...
- 25W, 1-15 in. Jensen speaker, guitar combo, six-tube chassis, preamp: 1 X 12AX7, 1 X 12AY7, 1 X 12AU7, power: 2 X 5881, rectifier: 5V4G, two channels, top control panel, four inputs (two per channel), six black chicken head knobs (Ch. 1 v...
- similar to the GA-77 Vanguard, except has a reverb circuit with six knobs (Ch. 1: v, b, t, Ch. 2: v, tone, r), tweed covering, full front slanted dark brown grille, 337 shipped, mfg. 1961 only.
- 25W, 1-15 in. Jensen speaker, six-tube chassis, preamp: 1 X 12AX7, 1 X 12AY7, 1 X 12AU7, power: 2 X 6L6, rectifier: 5V4, two channels, top control panel, four inputs (two per channel), six black chicken head knobs (1954-57: v1, v2, b, t,...
