TDK MAC-90
Very little is documented about the TDK MAC-90. The archive's files place it under audio, but no confirmed product type, production years, specifications, or original price survive. The record does not establish whether it was a blank cassette, an accessory, or a piece of equipment.
The period record offers one small, negative clue. Classified mail-order listings from the early 1980s show TDK's tape lineup - SA C-90 at $2.99 in High Fidelity (December 1981, p.143), and SA C-90 at $2.45 in Audio (March 1983, p.88). The MAC-90 never appears in any of the surviving pages from those years. It seems to have stayed out of the mainstream mail-order trade.
Beyond that, nothing is documented. No specifications survive.
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