Used Fender Dual Showman Reverb amp head mid 70's

The mid-1970s Fender Dual Showman Reverb head is essentially a standalone, piggyback-style head version of the iconic Fender Twin Reverb, built during the Silverface era (from 1970 to 1976 delivering 100 watts RMS, before bumping up to 135 watts in late 1977).

Power Output: 100 Watts RMS driven by a quad of 6L6GC power tubes, providing massive, sparkling clean headroom that stays loud and clean even at high stage volumes.
Channels: Two independent channels (Normal and Vibrato), each featuring a Bright switch, Volume, Treble, Middle, and Bass controls.
Onboard Effects: Genuine tube-driven spring reverb and an optical tremolo (labeled as vibrato) with Speed and Intensity controls.
Master Volume: Mid-70s units include a Master Volume control (and later pull-boost or phase-inverter updates), which lets you push the preamp a bit earlier, though the amp is still designed primarily for crystal-clear cleans rather than modern high-gain distortion