No. of Channels
Two-Channel
Amp Type
Tube
Inputs
Four inputs (two per channel)
Outputs
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- 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 silver control panel, four inputs (two per channel), 10 black and silver knobs (first version: Ch. 1: v, b, t, Ch. 2: v, b, t, r, depth, freq., power switch) or 12 black and silver knobs (second version: Ch. 1: v, t, m, b, Ch. 2: v, t, m, b, r, depth, freq., power switch), Indian Brown covering, Spanish Crush brown grille, 26 in. wide, 20 in. tall, 10.5 in. deep, 1,229 shipped (310 shipped with JBL speakers), mfg. 1962-67.
The earliest models built in 1962 may have featured an old-style cabinet covered in tweed. In 1963/64 a middle tone control was introduced to each channel. Although this amp was shipped through 1967, it doesn't appear that it adopted the style between 1965 and 1967 that featured black covering, a silver grille, and front white control panel.
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- 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. Jensen speaker, guitar combo, six tube chassis, preamp: 1 X 7025, 1 X 12AY7, 1 X 12AU7, power: 2 X 6L6, rectifier: 5V4, two channels, top control panel, four inputs (two per channel), four black chicken head knobs (Ch. 1 v,...
- 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.
- 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...
- 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),...
- approx. 25W, 2-10 in. speakers standard (GA-75) or 1-15 in. Lansing (Model GA-75L) speaker optional, guitar/bass combo, six-tube chassis, preamp: 2 X 6EU7, 1 X 6CG7 (6FQ7), power: 2 X 6L6, rectifier: 6C4, three diodes, two channels, top/r...
- 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,...
- 30W mono (2 X 15 Stereo), 2-10 in. Jensen speakers, stereo guitar combo, nine-tube chassis, preamp: 3 X 6EU7, 1 X 7199, 1 X 12AU7, power: 4 X 6BQ5, solid-state rectifier, two channels, tremolo, top silver control panel, five inputs (four...
