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Fender
Silverface Twin Reverb
2x12" Combo

Fender Twin Silverface 2x12" Combo

Per Day : $55
Per Week: $165

The Fender Twin Reverb is an all-tube guitar amplifier with two 12", 8 ohm speakers made by various suppliers. The more common speakers found in Fender Twin Reverbs include Jensen C12Ns, Oxford 12T6s, JBL D-120Fs, Utahs and, in later years, CTS and Eminence models. The Twin Reverb is frequently shortened in conversation to 'Fender Twin' or simply 'Twin', though it shouldn't be confused with the Tweed or Blonde era Twin amplifiers which had vastly different circuits and no reverb. The Fender Twin Reverb is considered a standard model for players seeking a clean sound, and it is especially known for the quality of its built-in spring reverb. All Twin Reverbs feature a solid state rectifier.

In 1968 the Fender amplifier line switched from a black faceplate to a brushed aluminum faceplate with light blue labels and changed the color of the grillcloth from silver grey to silver with sparkling blue threads embedded within it, ushering in the Silverface era. Other blackface cosmetic features were retained. The first silverface Twins made used the Blackface AB763 circuit until May 1968 when they began using the Silverface AC568 circuit.

The rating of the amplifier's output power was also upgraded to 100 watts. Fender factory schematics show slightly higher voltage on the output tube plates when compared to the older AB763 circuit. Some say that this accounts for the higher output power. It should be noted however, that the power transformer part number for the AB763 and the later circuit designs are identical, being part number 022756 (125P34A), and the specification of that part number did not change. The transformer output is rated at 640vCT at 450ma when its primary receives a 117v input. Other parts of the power supply are essentially the same, so some mystery surrounds the increase in power. One possible answer is voltage delivered to the amplifier from the wall plug. In North America, wall outlet power is considered to be 117v nominal, plus or minus 10 percent. Fender may have originally rated the amplifiers when plugged into the voltage available at their factory, which may have been as low as 105v. Maximum operating voltage would be about 127v. Quite possibly CBS saw fit to rate the amplifiers power at maximum input voltage, thus gaining an "upgrade" with no change, and at no cost whatsoever.

From about 1973 forward, a master volume with pull-boost (on a push-pull control) became a standard feature on all dual-channel silverfaced Fender models (usually known as "master volume" amps). Original master volume amps from late 1972 were made for a short time without that "pull boost" circuit on the master volume control. Between 1977-1982 the power was increased to 135 watts. This increase was partly due to the output section being changed to the ultralinear topology, as different power transformer and power supply design resulted in much higher plate voltages. During that period the "tailless" Fender amp logo was redesigned with a "Made in USA" script added on the bottom side.

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