Audio Research 90A (dates unknown)
Little is documented about the Audio Research 90A. The archive has no catalog scan, no original price, no production years, no circuit details and no specs for this model. The 90A doesn't appear in any of the period material on file - no review, no advertisement, no dealer listing. The model exists, and the record hasn't surfaced.
The period record does show where Audio Research sat in the used market in the early eighties. A classified advertiser in Audio (June 1982, p.73) asked $600 for an "Audio Research 0100," and two years later another Audio classified (May 1984, p.111) listed a D-90 amp at $750. Both are different models, not the 90A. They suggest that secondhand Audio Research gear already commanded serious money among enthusiasts.
If you own a 90A, or have original paperwork for one, the archive would like to hear from you. The model is real and the details are still missing.
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