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- 8W, 1-10 in. speaker, guitar combo, four-tube chassis, preamp: 1 X 12AX7, power: 2 X 6V6, rectifier: 5Y3, single channel, top control panel, two inst. inputs, single volume knob, available in brown covering with a round metal speaker grille (1952-53), light brown grained fabric with a square dark brown grille cloth (1954-57), or light tan covering with narrow sides, large speaker opening, and a metal handle, Gibsonette logo above grille, 17.5 in. wide, 13 in. tall, 7,365 shipped, mfg. 1952-59.
In 1958, the output was raised to 9W, the Gibson logo was moved above the grille, the handle was metal with a plastic middle, the covering was changed to a gold fabric, the grille was a dark brown, and the cabinet size was increased to 20 in. wide, 16 in. tall, 9 in. deep, and 20 lbs. Most of these amps don't actually have GA-8 stamped on them.
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- 12W, 1-12 in. Jensen speaker, guitar/microphone combo, five-tube chassis: preamp: 1 X 12AX7, 1 X 6SL7, power: 2 X 6V6, rectifier: 5Y3, two channels, top control panel, four inputs (three instrument, one mic), three black chicken head knob...
- similar to the GA-8 Discoverer, except has built-in tremolo, five-tube chassis, preamp: 2 X 6EU7, power: 2 X 6BQ5, rectifier: 6CA4, four knobs (v, tone, s, i, 1960-62) or five knobs (v, t, b, s, i), available in tweed covering with a full...
- 16W, 1-12 in. Jensen Concert Series speaker, guitar combo, five-tube chassis, preamp: 2 X 12AX7, output: 2 X 6V6, rectifier: 5Y3, two channels, top rear control panel, four inputs (three inst., one mic 1954-56, two per channel 1957-1961),...
- 14W, 1-10 in. Jensen speaker, guitar/microphone combo, five-tube chassis, preamp: 2 X 12AX7, power: 2 X 6V6, rectifier: 5Y3, two channels, top control panel, four inputs (two per channel), three control knobs (v1, v2, tone), tweed coverin...
- 10W, 1-10 in. speaker, three tube chassis, preamp: 6EU7, power: 6BQ5, rectifier: 6X4, two diodes, single channel, front silver control panel, two inputs, four knobs (v, t, b, power), black alligator covering, gray grille, 17 in. wide, 14....
- similar to the GA-5 Skylark (Third Version) except has built in-tremolo, a four-tube chassis, preamp: 2 X 6EU7, power: 6AQ7, rectifier: 6X4, and six knobs (v, t, b, depth, freq., power), 4,993 shipped, mfg. 1966-67.
- 14W, 1-10 in. speaker, guitar combo, five-tube chassis, preamp: 1 X 12AX7, 1 X 6SL7, power: 2 X 6V6, rectifier: 5Y3, two channels, three inputs (Ch. 1: two inst., Ch. 2: one inst./mic), three knobs (two v, tone), light tweed covering, dar...
- wattage unknown, 1-10 in. speaker, six-tube chassis, preamp: 2 X 6EU7, 1 X 12AX7, power: 2 X 6AQ5, rectifier: 6CA4, single channel, tremolo, reverb, top silver control panel, two inputs, four black and silver knobs (v, r, tremolo freq., p...
