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ELECTRIC TUBE AMPS: MISC. MODELS

Models (3)

625-D MANHATTAN

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- 25W, 2-12 in. Jensen speakers, six-tube chassis: preamp: 2 X 6CG7, 1 X 12AU7, 1 X 6SL7, power: EL37, rectifier: 5U4, two channels, top chrome control panel, six black knobs (v, b, t, for each channel), Navy Random Flair covering, gray grille, mfg. 1959-1961.
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AC-12

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- 20W, 1-12 in. speaker, accordion combo, five-tube chassis, preamp: 1 X 12AX7, 1 X 6U10, 1 X 12DW7, power: 2 X 7591A, solid-state rectifier, single channel, reverb, tremolo, silver front control panel, two inputs, six black knobs (v, b, t, reverb, s, i), black covering, blue/gray grille, mfg. 1970 only.
The AC-12 was a new Ampeg specifically designed for Accoridans that did not sell well. After one year, Ampeg took the circuit from this and developed it into a new guitar amplifier that replaced the Rocket II. This was the last amp that Ampeg made especially for accordians.
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GU-12

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- 20W, 1-12 in. speaker, guitar combo, five-tube chassis, preamp: 1 X 12AX7, 1 X 6U10, 1 X 12DW7, power: 2 X 7591A, solid-state rectifier, single channel, reverb, tremolo, silver front control panel, two inputs, six black knobs (v, t, b, i, s, echo dimension [reverb]), standby switch, power switch, black covering, blue/gray grille, mfg. 1971-73.
The GU-12 is similar to the AC-12, except it doesn't have a negative-feedback loop and was specifically designed for guitar use.
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