Yamaha CDX-1100U (1987)

The Yamaha CDX-1100U was a compact disc player built around Yamaha's proprietary "Hi-bit" digital-to-analog conversion scheme. Nearly everything known about it comes from period press coverage. Surviving documentation is thin.

Reviewers were impressed by the core technology. High Fidelity (December 1987, p.56) praised Yamaha's proprietary approach, which bypassed the lowest two bits of the D/A converter when those bits were not necessary for accurate reproduction. It also noted that Yamaha continued to surprise with its command of digital audio. Audio (November 1987, p.20) reported that the player used an 18-bit digital filter and that the Hi-bit technique gave a 20 dB improvement in signal-to-noise ratio over conventional conversion methods. A floating suspension was also listed among its features. Yamaha's own advertising pushed the same message harder. It set its "redefined" 18-bit/176.4 kHz oversampling standard against what it called the 16-bit/88.2 kHz industry standard (High Fidelity, June 1987, p.50 - ad).

Beyond those period reports, little is recorded. No service documentation, production figures, or original US price have surfaced in the archive's research.