Maxell 90B

Little is documented about the Maxell 90B. The one solid trace of it in the period record is a line in a blank-tape price ad. HiFI-Stereo (January 1978, p.137) lists the “UDXL35-90B” at $5.40, grouped under “Quality Blank Tapes” with Maxell’s UDXL-C60, UDXL-C90, UD-C90, and LN-C90 cassettes. The model number as printed suggests a member of Maxell’s UDXL-35 tape family. Beyond that, no specifications, packaging details, or reviews appear to have survived.

What the record shows:

Listed as “UDXL35-90B” in a HiFI-Stereo (January 1978, p.137) blank-tape price ad
Advertised price: $5.40
Sold in the UD/UDXL cassette family
No other period documentation found

Maxell’s own advertising of the era (High Fidelity, September 1976, p.27) emphasized dust-free manufacturing and unusually strict quality standards for its tapes generally. That says something about how the brand positioned cassettes like the 90B, but the campaign doesn’t single out this model.