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ELECTRIC TUBE AMPLIFIERS

Models (11)

GA-1RT/GA-1RVT (MAESTRO) REVERB-ECHO

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- 8W, 1-8 in. speaker, three tube chassis, preamp: 1 X 12AX7, power: 1 X 6BM8, rectifier: 5Y3, single channel, tremolo, reverb, top mounted nickel control panel, two instrument inputs, two or three black chicken head knobs (v, s, r), tweed covering, brown grille, 2,183 shipped, mfg. 1961 only.
There were two variations of this amp as the GA-1RVT and the regular GA-1. Specs are unknown on these models, but the GA-1RVT has two knobs where the GA-1RT has three knobs. Both models were advertised with reverb, but the RVT is the only one that has a control for reverb.
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GA-2RT (MAESTRO) DELUXE REVERB-ECHO

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- 16W, 1-12 in. Jensen speaker, eight tube chassis, preamp: 4 X 6EU7, 1 X 12AU7, power: 2 X 6V6, rectifier: 5Y3, two channels, top mounted nickel control panel, four inputs (two per channel), five black and silver knobs (v1, v2, tone, r, one dual purpose s, depth for tremolo), tweed covering, brown grille, 20 in. wide, 16 in. tall, 396 shipped, mfg. 1961 only.
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GA-15RV (MAESTRO)

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- 14-16W output, 1-12 in. Jensen speaker, seven tube chassis, preamp: 3 X 6EU7, 1 X 12AU7, power: 2 X 6V6, rectifier: 5Y3, two channels, reverb, top chrome control panel, four inputs (two per channel), five black and silver knobs (v1, v2, t, b, r), dark covering, light grille, 135 shipped, mfg. 1961 only.
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GA-16T VISCOUNT (MAESTRO)

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- 14W, 1-10 in. speaker, 5 tubes, preamp:2 X 12AX7, power: 2 X 6V6, 5Y3 rectifier, single channel, tremolo, top chrome control panel, three inputs, four black chicken head knobs (v, tone, depth, freq.), tweed covering, dark slanted grille cloth, mfg. 1959-1961.
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GA-45T SATURN (MAESTRO STANDARD)

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- 14W, 4-8 in. Jensen speakers, designed for accordions, seven tube chassis: preamp: 2 X 5879, 1 X 6SQ7, 1 X 12AX7, power: 2 X 6V6, rectifier: 5Y3, two channels, tremolo, top control panel, four inputs (two per channel), six black knobs (v1, v2, b, t, trem depth, freq), two-tone gray covering, brown grille, 22 in. wide, 20 in. tall, 10.125 in. deep, 34 lbs., 2,161 shipped, mfg. 1955-1961.
In 1958, the output was increased to 16W, a new style was introduced with a two-tone deluxe ebony sharkskin/light patterned tweed covering, and only "Maestro" logo above grille. In 1960, tweed covering was introduced with a dark brown grille with "Maestro" logo in upper right corner. This model is very similar to the GA-40, but it has separate treble and bass controls and a different speaker configuration.
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GA-45RV Saturn (Maestro)

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- similar to the GA-45T except has reverb instead of tremolo, 106 shipped, mfg. 1961 only.
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GA-46 SUPER MAESTRO

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- 60W, 2-12 in. speakers, accordion combo, ten tube chassis, preamp: 3 X 7025, 2 X 5879, 1 X 6SN7, 1 X 6V6, power: 2 X 6550, rectifier: 5AR4, two channels, tremolo, top/rear control panel, four inputs (two per channel), eight black knobs (Ch. 1: v, b, t, s, depth, Ch. 2: v, b, t), chickenhead power knob, external speaker jack, included Gada-Kart four-wheel dolly, two tone dark gray/light tweed style, light brown grille with "Maestro Super" logo, metal handle with plastic middle, 20 in. wide, 20 in. tall, 10.5 in. deep, 62 lbs., 53 shipped, mfg. 1957-1961.
In 1960, a tweed covering was introduced, the Gada-Kart was no longer offered, and the handles were moved to the side.
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GA-78 MAESTRO 30

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- 30W (2 X 15W Stereo), 2-10 in. speakers, eight tube chassis, preamp: 4 X 6EU7, power: 4 X 6BQ5, two channels, top silver control panel, five inputs (four mono, one stereo), six black and silver knobs (Ch. 1: v, b, t, Ch. 2: v, b, t), stereo-mono switch, charcoal grey casing, brown grille, cabinet is set up so speakers face away from each other, 25.75 in. wide in back, 11 in. wide in front, 18.75 in. tall, 10.5 in. deep, 139 shipped, mfg. 1960-61.
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GA-78RV Maestro 30 Reverb

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- similar to the GA-78, except has a reverb circuit, nine-tube chassis, preamp: 3 X 6EU7, 1 X 7199, 1 X 12AU7, power: 4 X 6BQ5, reverb control for a total of seven knobs, 105 shipped, mfg. 1961 only.
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GA-78RVT Maestro 30 Reverb Tremolo

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- similar to the GA-78, except has a reverb and tremolo circuit, tube chassis unknown, 4 shipped, mfg. 1961 & 63 only.
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GA-87 MAESTRO STEREO-ACCORDION

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- 35W, 2-12 in. speakers, eight tube chassis, preamp: 3 X 12AX7, power: 4 X 6BQ5, rectifier: GZ34, two channels, four inputs, seven knobs, tweed covering, brown grille with "Maestro Stereo" logo, metal handle with plastic middle, 22.75 in. wide, 22 in. tall, 13 shipped, mfg. 1960-61.
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