Pioneer NCD-600
Information on a Pioneer NCD-600 is thin to the point of not existing. The archive's sources have no manual, no spec sheet, and no period listing for a Pioneer model by this name. So we can't confirm what it was, when it was made, or what it did.
The one "NCD-600" in our period files belongs to a different maker. In its June 1986 group test of four CD changers, Audio (June 1986, p.65) described the Nikko NCD-600 as a mammoth machine approaching CD-jukebox territory, with a 60-disc capacity. That is ten times the six-disc magazine of the Pioneer PD-M6 tested alongside it. The same issue's spec table credits the Nikko with a frequency response of 10 Hz - 20 kHz ±0.5 dB (Audio, June 1986, p.73). It also notes that all four changers in the test, the Nikko included, used analog output filtering and a single multiplexed digital-to-analog converter (Audio, June 1986, p.71).
Whether a Pioneer-branded NCD-600 ever existed, or whether this entry comes from a mix-up with Nikko's jukebox-like changer, the record doesn't say.
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