Kenwood 660HX
Little is documented about the Kenwood 660HX. The Archive's picture of it rests almost entirely on one detailed Equipment Profile in Audio (April 1988, p.82). That review identifies the 660HX as a cassette deck aimed at the moderate-price bracket. The reviewer's verdict was warm: for its price, it performed very well in most respects, and its many features offered real benefits (Audio, April 1988, p.86).
The published specifications listed frequency response of 20 Hz to 16 kHz with Type I tape, extending to 17 kHz with Type II and 18 kHz with Type IV. The measured results backed that up. Record/playback response at −20 dB was very flat for all three tape types over nearly the entire band (Audio, April 1988, p.84). The deck's features included Zero Stop, Index Scan, and a Blank Search that found unrecorded tape - all of which got steady use during the review. The reviewer's own copies, made onto Denon HD8 with record level pulled back a couple of dB from the initial setting, sounded "really quite good."
A later Audio item (March 1990, p.66) returned to the 660HX in a tape-matching context. It noted that Type IV formulations offered higher 125-Hz MOL and a slightly better 0-dB response on the deck. Memorex CDX II showed excessive treble boost because of its high bias requirement.
Beyond those two magazine accounts, essentially nothing is recorded: no service literature, original price, or production dates have surfaced in the Archive's sources. If you own a 660HX manual or brochure, it would fill a genuine gap in the record.
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