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ELECTRIC TUBE AMPS: TWIN SERIES

For "The Twin" model made in the late 1980s and early 1990s, see the Pro-Tube series.

Models (12)

TWIN (WIDE PANEL)

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- 15W, 2-12 in. Jensen Concert Series speakers, tube chassis, preamp: 3 X 6SC7, 6J5, power: 2 X 6L6, 5U4 rectifier, top numbered control panel, four input jacks, four pointer knobs (mic v, inst. v, b, t), diagonal tweed covering, brown cloth grille, mfg. 1952-54.
This was the first wide panel amp for Fender and the first to offer dual tone controls. Model 5D8 featured a 12AY7 tube.
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TWIN (NARROW PANEL)

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- 50W, 2-12 in. Jensen speakers, tube chassis, preamp: 3 X 12AY7, 12AX7, power: 2 X 6L6, rectifer: 2 X 5Y3GY, top numbered control panel, four input jacks, five pointer knobs (mic v, inst. v, b, t, p), diagonal tweed covering, brown tweed-era grille, mfg. 1954-1960.
Model 5E8 was the first to have 50W. In 1955, the rectifers were changed to 2 X 5U4G (Model 5F8) and later on to a5AR4 (Model 5F8-A). In 1956, a mid-range control is added along with bright and normal inputs. In 1958, the preamp and driver tubes were changed to a 12AY7 and 2 X 12AX7, and the output tubes are changed to 4 X 5881. This is model 5F8-A, and power output was reported at 85W. The control panel now had six knobs. A few of the very late (1960) models were covered in brown Tolex with the top control panel. Some collectors say early Twin's had 2-10 in. speakers.
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TWIN (BROWNFACE)

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- 90W, 2-12 in. Jensen speakers, tube chassis, preamp: 6 X 7025, power: 4 X 6L6GC, solid state rectifier, two channels, tremolo, front brownface control panel, four input jacks (two normal, two vibrato), nine cream knobs (Norm: v, t, b, Vibrato: v, t, b, s, i, Both: p), available in brown (1960 only) or cream Tolex covering, maroon or wheat colored grille, mfg. 1960-63.
Model number 6G8A changed the tube schematics to 6 X 7025 and 4 X 6L6. There are many different variants of this model over its 11 year existence. There are a few amps made with brown tolex covering and a smaller box. The Twin was phased out when the Twin Reverb was introduced.
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TWIN REVERB (BLACKFACE)

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- 85W, 2-12 in. Jensen speakers, tube chassis, preamp: 3 X 7025, 2 X 12AT7, 12AX7, power: 4 X 6L6GC, solid-state rectifier, two channels, reverb, vibrato, front blackface control panel, four input jacks (two normal, two vibrato), bright and middle switches, 11 silver-top knobs (Norm: v, t, m, b, Vibrato: v, t, m, b, r, s, i), black tolex covering, silver grille, mfg. 1963-67.
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TWIN REVERB (SILVERFACE)

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- 85W, 2-12 in. Jensen speakers, tube chassis, preamp: 3 X 7025, 2 X 12AT7, 12AX7, power: 4 X 6L6GC, solid-state rectifier, two channels, reverb, vibrato, front silverface control panel, four input jacks (two normal, two vibrato), bright and middle switches, 11 silver-top knobs (Norm: v, t, m, b, Vibrato: v, t, m, b, r, s, i), black tolex covering, silver grille, mfg. 1968-1980.
In 1968, the Silverface is introduced with silver control panel, blue cloth grille, and aluminum trim. The Silverface is the same as the Blackface in the schematics. In 1973, the output was raised to 100W and a master volume control was added. In 1976, a push/pull distortion switch was added to the master volume control and JBL speakers became an option.
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TWIN REVERB (NEW BLACKFACE)

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- 135W, 2-12 in. Jensen speakers, tube chassis, preamp: 4 X 7025, 2 X 12AX7, power: 4 X 6L6GC, solid-state rectifier, two channels, reverb, vibrato, front blackface control panel, four input jacks (two normal, two vibrato), bright and middle switches, 12 silver-top knobs (Norm: v, t, m, b, Vibrato: v, t, m, b, r, s, i, MV), black tolex covering, silver grille, mfg. 1981-83.
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QUAD REVERB

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- 100W, 4-12 in. Jensen speakers, tube chassis, preamp: 4 X 7025, 2 X 12AT7, power: 4 X 6L6, solid-state rectifier, two channels, reverb, vibrato, front silverface control panel, four input jacks (two normal, two vibrato), bright and middle switches, 12 silver-top knobs (Norm: v, t, m, b, Vibrato: v, t, m, b, r, s, i, MV), black tolex covering, silver grille, mfg. 1970-79.
The Quad Reverb has the same chassis as the Twin Reverb.
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SUPER SIX REVERB

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- 100W, 6-10 in. Jensen speakers, tube chassis, preamp: 4 X 7025, 2 X 12AT7, power: 4 X 6L6, solid-state rectifier, two channels, reverb, vibrato, front silverface control panel, four input jacks (two normal, two vibrato), bright and middle switches, 12 silver-top knobs (Norm: v, t, m, b, Vibrato: v, t, m, b, r, s, i, MV), black tolex covering, silver grille, mfg. 1970-79.
The Super Six Reverb has the same chassis as the Twin Reverb. It features removable casters on the side and uses a series-parallel connection.
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SUPER TWIN

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- 180W, 2-12 in. speakers, tube chassis, preamp: 2 X 7025, 12AT7, 6CX8, 6C10, power: 6 X 6L6, solid-state rectifier, front black control panel, two inputs, elaborate equalization system, new active electronics, 12 silver-top knobs, (v, t, m, b, p, distortion, output level, and five-way equalization), black tolex covering, black grille with white trim, casters, mfg. 1975-76.
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Super Twin Reverb

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- similar to Super Twin except has reverb unit, tube schematics were changed to: one 7025 was replaced with two sections of a 6C10 triple triode, the reverb driver was a 6CX8 pentode, mfg. 1977-1980
This model replaced the Super Twin in 1977.
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TWIN REVERB II COMBO

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- 105W, 2-12 in. speakers, tube chassis, preamp: 5 X 7025, 2 X 12AT7, power: 4 X 6L6GC, new blackface control panel, two inputs, 12 silver-top knobs (Ch.1: v, t, m, b, Ch.2: v, g, MV, t, m, b, r, p), three-stage distortion, channel switching, rear mounted effects loop, black tolex covering, silver grille, mfg. 1982-85.
Note: production of this amp stopped in 1985 at the end of CBS ownership, but was still sold through 1986.
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Twin Reverb II Piggyback

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- similar to the Twin Reverb II Combo, except in piggyback configuration with a separate head and speaker cabinet, black tolex covering, silver grille, mfg. 1982-85.
Note: production of this amp stopped in 1985 at the end of CBS ownership, but was still sold through 1986.
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