ARC 100A
Little is documented about the ARC 100A. No verified specifications, production years, original price, or design details survive in the available record. The model name shows up in period audio literature, but nothing there ties it definitively to ARC.
A reference to a "Model 100A" appears in a discussion of Dolby noise reduction equipment in HiFI-Stereo (December 1971, p.70). The unit would have two line inputs with mixing capabilities and no built-in microphone preamplifiers. An optional MPR-1 stereo microphone preamplifier was available for $20. An earlier item in Audio (November 1957, p.2) describes a "PR100A Audio Control and Preamplifier" with a frequency response of 10 to 100,000 cycles ±0.5 dB and a range of front-panel controls. Whether either of these is the ARC 100A, or a product from a different maker with a similar model number, is not confirmed by any known documentation.
Nothing further has been traced beyond these ambiguous period mentions. The archive welcomes any information that might clarify the identity and history of this model.
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