Fisher X 100 B (1962–1964)
A stereo integrated tube amplifier from Fisher, introduced in 1962 and sold through 1964.
Overview
The Fisher X-100-B is a stereo integrated tube amplifier made by Fisher Radio Corporation. Introduced in early 1962, it was sold through 1964 and marketed as a high-end audio component. It features a tube-based preamplifier and main amplifier section, using 7868 beam-power output tubes in a push-pull configuration. The unit includes tone controls, a tape monitor switch, a high-cut filter, loudness control, and a DC ignition system for the preamplifier section. It also allows direct connection of a center speaker for 3D stereo playback.
Specifications
| Product type | Integrated Amplifier |
| Output tubes | 7868 beam-power output tubes |
| Tube complement | 6 x ECC83, 4 x 7868 |
| Diodes | 2 pcs |
| Frequency response | 10 Hz ~ 75 kHz +0 -1.5 dB |
| Input sensitivity | Tape head: 2mV, Phono: 3.5mV, Tuner/Aux/Tape play: 300mV |
| Tone control range | Bass: 22 dB at 50 Hz, Treble: 20 dB at 10 kHz |
| Weight | 10 kg |
| Original price | $169.50 |
Context
The Fisher X-100-B was positioned as a high-tier model in its time, with High Fidelity magazine noting in May 1963 that only three finer control amplifiers were available on the market.
Market
One example was listed for $450 obo in a recent sale, indicating collector interest. Some owners recommend checking for drying-out capacitors during maintenance, and the Miller Audio FAQ notes that the 5AR4/GZ34 rectifier may be a point of concern due to insufficient current reserve.
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