ART Eico HF-81 (1959)
Little is documented about the ART Eico HF-81. The Archive's catalog entry places it in 1959 as an audio product under the ART brand. The only period record is a stereo kit report in HiFi/Stereo Review (August 1960, p.50). The fragmentary text of that report gives distortion of 0.5% at 5 watts and 1% at 12 watts, reaching about 2% at 28 watts. That last figure matches the manufacturer's own rating. The surviving OCR is incomplete and never names the unit under test, so even this attribution is tentative.
Past that, the verifiable record is empty. No confirmed circuit details, original price, production history, or literature on the ART/Eico relationship has surfaced. If you have one of these and know more, the Archive would like to hear from you.
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