No. of Channels
Two-Channel
Amp Type
Tube
Inputs
Six inputs (three for instruments, three for accordions)
Outputs
--
1961 Ampeg 1961 Ampeg M-15 Big M 20w Amplifier Navy Blue Sparkle
Reverb
$1,100.00
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- 20W (early models) or 25W (later models), 1-15 in. Jensen speaker, guitar combo, six tube chassis, preamp: 3 X 6SL7, power: 2 X 6L6 outputs, rectifier: 5U4, two channels, top control channel, six inputs (three for instruments, three for accordions), six black knobs (Ch. 1: v, tone, Ch. 2: v, tone, s, i), power switch, available in Navy Random Flair covering with a gray grille cloth with white swirls (1959-1962) or Blue Check covering with a gray grille (1962-65), mfg. 1959-1965.
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- 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,...
- 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 R-12 Rocket, except has an updated chassis, mfg. 1964-65.
- similar to the M-12 Mercury except has an updated chassis, mfg. 1964-65.
- similar to the J-12 Jet (Second Version) except has reverb with an additional 6U10 preamp tube and a reverb control, mfg. 1968-1970.
- similar to the J-12A, except has 2 X 6BK11 preamp tubes, mfg. 1965 only.
- similar to the R-12R Reverberocket, except has a revised chassis with either 7591A or 7868 power tubes, mfg. 1965 only.
- similar to the J-12T Jet, except has a solid-state rectifier instead of a 5Y3GT, mfg. 1965-66.
