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ELECTRIC TUBE AMPS: ECHO SERIES

In 1961, Ampeg began offering reverb on their amplifiers and the first was the R-12R Reverberocket followed by the ET-1 Echo Twin. Ampeg also developed a unit that would allow users to add reverb to their existing amp. The ES-1 Echo Satellite attached to the speaker lugs of another separate amp with alligator clips and used the signal from the other amplifier to produce a reverb effect. In 1962, Ampeg introduced their extremely popular ET-2 Super Echo Twin that featured two amplifiers housed in the same unit that produced stereo sound with reverb.

Models (7)

EJ-12 ECHO JET

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- 12W, 1-12 in. speaker, add-on reverb unit that can also be used as a stand alone guitar amplifier, four tube chassis, preamp: 1 X 6D10, power: 2 X 7591, rectifier: 5Y3GT, single channel, top control panel, two inputs, two knobs (v, tone), power switch, one-button footswitch, available in Blue Check covering with a gray grille, mfg. 1963-64.
The EJ-12 Echo Jet was designed to be used as reverb unit that could be added to any amplifier that did not have reverb. However, it could also be used as a stand alone guitar amplifier similar in performance to the J-12 Jet, but when used as just a guitar amplifier reverb could not be utilized.
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EJ-12A/EJ-12D Echo Jet

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- similar to the EJ-12 Echo Jet, except has revised electronics/preamp sections, EJ-12A replaced the EJ-12 in early 1965 and the EJ-12D followed, mfg. 1965 only.
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ES-1 ECHO SATELLITE

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- 6W, 1-8 in. oval speaker (early models), 2-4 in. speakers (later models), add-on reverb unit that attaches to a separate amplifier with alligator clips, three tube chassis: preamp: 1 X 6SL7, power: 1 X 6V6GT, rectifier: 5Y3, single channel, top control panel, single reverb knob, available in Navy Random Flair covering with a gray grille (1961-62) or Blue Check covering with a gray grille (1962-63), mfg. 1961-63.
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ET-1 ECHO TWIN

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- 30W (2 x 15W stereo with two separate power amps), 2-12 in. Jensen speakers, guitar/accordion combo, 10 tube chassis (two power tubes and one rectifier for each power amp), preamp: 4 X 6SL7, power: 4 X 6V6, rectifier: 2 X 5Y3, two channels, tremolo, stereo echo (reverb), top chrome control panel, three inputs, eight knobs (Ch. 1: v, tone, s, i, Ch. 2: v, tone, s, i), echo switch, power switch, two-button footswitch, available in Navy Random Flair covering with a gray grille cloth (1961-62) or Blue Check covering with a gray grille (1962-63), mfg. 1961-63.
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ET-1-B Echo Twin

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- similar to the ET-1 Echo Twin, except has an eight-tube chassis with 4 X 6SL7 preamp tubes, 4 X 7591A power tubes and solid-state rectifiers, available in Blue Check covering with a gray grille, mfg. 1963-64.
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ET-2 SUPER ECHO TWIN

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- 30W (2 x 15W stereo with two separate power amps), 2-12 in. Jensen speakers, guitar/accordion combo, 10 tube chassis (two power tubes and one rectifier for each power amp), preamp: 4 X 6SL7, power: 4 X 6V6, rectifier: 2 X 5Y3, two channels, vibrato, stereo echo (reverb), top chrome control panel, five inputs (two inputs per channel and one stereo input), seven knobs (Ch. 1: v, tone, s, i, Ch. 2: v, tone, echo dimension), channel selector switch (Channel 1 only or Channel 1 and 2), power switch, two-button footswitch, available in Navy Random Flair covering with a gray grille cloth (1962 only) or Blue Check covering with a gray grille (1962-63), mfg. 1961-63.
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ET-2-B Super Echo Twin

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- similar to the ET-2 Super Echo Twin, except has an eight-tube chassis with 4 X 6SL7 preamp tubes, 4 X 7591A power tubes and solid-state rectifiers, available in Blue Check covering with a gray grille, mfg. 1964 only.
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