The first Fender Bassman amplifier was introduced in 1952 and was specifically designed to accompany the company's Precision Bass. However, by the early 1960s, Bassman amps, which lacked a booming low-end sound, were more commonly used by electric guitarists. The 100-watt Fender Bassman 100 head was produced from 1972 to 1977. It was the most powerful of the Bassman range, until it was superseded by the larger Bassman 135 in 1978.
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Configuration Data and Appearance
The configuration of the Bassman 100 head is "piggyback," which means that it is designed to rest on top of a loudspeaker cabinet. Its dimensions are 8 3/4 inches tall, 26 1/8 inches long and 9 1/2 inches deep. The head is covered with black Tolex, a stretchy, tough black cloth designed for coating amps. The grill cloth is Blue Sparkle, but lacks the aluminium frame which featured on the earlier Super Bassman model. The Bassman 100 can be carried by a handle and is equipped with corner protectors. Because of the silver plate upon which the control knobs are mounted, it is known as a "silverface" amp.
Front of the Amp Head
There are four jack inputs on the front of the amp, including two bass inputs and two normal inputs. The bass channel includes volume, treble and bass control knobs and a deep switch. The normal channel has volume, treble, mid and bass controls, along with a bright switch. There is also a master volume knob. All the knobs are black, with chrome centres and can be adjusted through settings numbered from 1-10. They are labelled with blue writing at the foot of the amp's "silverface." A pilot lamp is fitted on the right-hand side. This is lit whenever the amp is powered.
Rear of the Amp Head and Tubes
The power and standby switches are located on the rear side of the Bassman 100, along with two jacks for connecting the head to loudspeaker cabinets, the ground switch and the fuse. The amp features a 12AT7 and two 7025 preamp tubes and is powered by six 6L6 tubes. The 6L6 is a beam power pentode tube, which was designed in 1936 and is known for its capacity to carry heavy loads and produce high volumes from speakers.
Similarities to Super Bassman Model
The Bassman 100 model was a close relative of the Super Bassman head, which was their largest bass amp when it was released in 1969. The main difference between the two models was that the Bassman 100 was packaged with four 12-inch speakers, whereas the Super Bassman used two 15-inch speakers.
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