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- 12W, 1-12 in. speaker, guitar combo, four-tube chassis: preamp: 2 X 12AX7, power: 2 X 7591A, solid-state rectifier, single channel, tremolo, front control panel, two inputs, five black knobs (v, t, b, s, i), available in Blue Check covering with a gray grille, mfg. 1965-67.
This amp replaced the R-12 Rocket and it featured Ampeg's new Repeat Percussion effect. Ampeg also offered a model identical to this one with four inputs instead of two called the Gemini IV.
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- 18W, 1-12 in. speaker, four-tube chassis, preamp: 2 X 12AX7, power: 2 X 7591, solid-state rectifier, single channel, tremolo, top chrome control panel, two inputs (bright, normal), three black knobs (v, tone, tremolo), power switch, singl...
- 25W, 1-15 in. speaker, guitar or accordion combo, six tube chassis, preamp 2 X 6SL7, 1 X 6SN7, 1 X 7025, power: 2 X 6V6GT (1963 only) or 2 X 7591A (late 1963-64), solid-state rectifier, single channel, tremolo, echo dimension (reverb) top...
- similar to the J-12 Jet, except has 7591A power tubes, mfg. 1964 only.
- similar to the R-12R Reverberocket, except has a revised chassis with either 7591A or 7868 power tubes, mfg. 1965 only.
- 15W, 1-12 in. speaker, six tube chassis, preamp: 3 X 6SL7, power: 2 X 6V6GT, rectifier: 5Y3, two channels, tremolo, top black control panel, four inputs (two instruments, two accordions), six black knobs (Ch. 1: v, tone, Ch. 2: v, tone, B...
- 15W, 1-12 in. speaker, guitar or accordion combo, seven tube chassis, preamp 2 X 6SL7, 2 X 6SN7, power: 2 X 6V6GT, rectifier: 5Y3, single channel, tremolo, echo dimension (reverb), top black control panel, three inputs (guitar, accordion,...
- similar to the M-12 Mercury except has an updated chassis, mfg. 1964-65.
- similar to the R-12R Reverberocket, except has 7591A power tubes, mfg. 1964 only.
