Sansui 9900Z (circa 1981–1982)

Documentation on the Sansui 9900Z is thin, and much of what survives is advertising rather than hard bench data. The model appears to have been part of Sansui's "Z" receiver line of the early 1980s. The name and the campaign around it point that way, though surviving ads rarely call out the 9900Z by number.

Sansui's "Z" receiver ads in Audio (May 1981, p.28) and High Fidelity (May 1981, p.26) touted a "spectrum worth analyzing" and digital circuitry said to lock in every received station for the lowest possible distortion. Later ads in the series, in Audio (March 1982, p.87) and HiFI-Stereo (April 1982, p.33), credited quartz PLL circuitry in the three top Z models. They also listed twelve instant-tune presets, tape dubbing facilities, dual phono inputs, and multi-system speaker switching.

A comparison-type listing in HiFI-Stereo (1982, p.50) appears to show the 9900Z rated at 20-20,000 Hz into 8 ohms with 0.05% THD. The tuner has a digital frequency readout, quartz-lock tuning, an LED signal-strength and multipath bar display, 50 dB stereo quieting at 36.1 dBf, and 0.25% FM distortion. The attribution is not fully unambiguous, because the OCR of that table is messy. Treat those figures as period listing data, not confirmed bench results. No owner's manual, service literature, or standalone review of the 9900Z has surfaced so far.