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- 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), six knobs (Ch. 1: v, tone, depth, freq, Ch. 2: v, tone), mono-stereo switch, footswitch for tremolo, six sided trapezoid-shaped cabinet with tweed covering, woven brown Saran grille cloth, two oblong holes in the front, 25.75 in. wide in back, 11 in. wide in front, 18.75 in. tall, 10.5 in. deep, 210 shipped, mfg. 1960-61.
The original GA-79 model was advertised as having reverb, but the control panel in the catalog clearly shows knobs for tremolo (depth, freq.), and none for reverb. All Gibson amps during this era only used one knob for reverb. The GA-79 was replaced by the GA-79RV with reverb in 1961.
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- 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...
- approx. 35-40W, 4-10 in. speakers, guitar combo, nine-tube chassis, preamp: 4 X 6EU7, 1 X 12AU7, 1 X 6CG7, power: 2 X 6L6, rectifier: 0A2, two channels, reverb, tremolo, front white control panel, four inputs (two per channel), 12 black k...
- 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...
- 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...
- similar to the GA-55, except has vibrato circuit with a remote vibrato switch and control that plugged into the player's guitar, 473 shipped, mfg. 1954-58.
- 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,...
- 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...
