Video
Story
The Fender Twin Reverb is a guitar amplifier made by Fender Musical Instruments Corporation. The Twin was introduced in 1952, two years before Fender began selling Stratocaster electric guitars. The amps are known for their characteristically clean tone.
In 1968 Fender changed to the “silverface” control panel. The circuitry was altered as well: There were changes to the bias and phase inverter circuits and, most important, the output stage. For whatever reason, the engineers at Fender added seven additional components to the output stage, effectively turning it into a semi-cathode-biased output. While these amps were supposedly rated at 100 watts, they are nowhere near as potent as their predecessors. Some players actually prefer these models, however, because they tend to compress more easily than any other Twin. According to the dates on Fender schematics, these “improvements” only lasted for a year. You can easily identify these 1968 amps by the silver-metal band around the perimeter of the grille cloth.
Many notable musicians have used Fender Twin amplifiers, including Mark Knopfler, David Gilmour, Chuck Berry, Mike Oldfield, The Beatles[3] (1968 Twin Reverb amps using the AC568 circuit),[4] Jimi Hendrix,[5] Eric Clapton,[5] Peter Green, Jeremy Spencer, Danny Kirwan, Keith Richards, Steve Jones (Sex Pistols), Jerry Gar cia (Grateful Dead), Eric Johnson.
Specifications
Model/Circuit Number: AC568, AA769, AA270
Years of Production: 1968 – 1982
Era: Silverface
Configuration: Combo
Controls: Silver, forward facing w/ blue labels
Knobs: Black skirted w/ chrome center, numbered 1 – 10
Front: 68-71: Normal: In, In, Bright Sw, Vol, Treb, Mid, Bass – Vibrato: In, In, Bright Sw, Vol, Treb, Mid, Bass, Rev, Speed, Intensity – Pilot Lamp ; 72-83: Normal: In, In, Bright Sw, Vol, Treb, Mid, Bass – Vibrato: In, In, Bright Sw, Vol, Treb, Mid, Bass, Rev
Rear: AC Outlet, Ground Sw, Fuse (2½A), Power Sw, Standby Sw, Speaker Jack, Ex. Speaker Jack, Vibrato Jack, Reverb Jack, Reverb Out, Reverb In
Cabinet Dimensions: 20 x 26 x 10½
Hardware: Large Chassis Straps 5 5/8”
Handle: Black Strap Handle
Feet: Glides (68-71) or Casters (72-82)
Corners: Corner Protectors
Tolex/Tweed: Black Tolex
Grill Cloth: Black/White/Silver
Weight: 69 lbs
Speaker Size: 2 x 12
Impedance: 4 ohms
Model: Oxford 12T6, Utah 12
Effects: Reverb, Tremolo
Watts: 68-76: 100 Watts ; 77-82: 135 Watts
Tubes Preamp: 7025
Power: 4 x 6L6GC
Bias: Fixed, adjustment pot or balance pot
Manual
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