Sansui QRX-7001 (circa 1975–1976)

Documentation on the Sansui QRX-7001 is thin. There is a short run of period magazine coverage - one consumer's guide test and a few Sansui ads - but it is enough to place the model as a premium four-channel receiver from the first half of the 1970s. High Fidelity (July 1975, p.35) ran a consumer's guide test describing the QRX-7001 as a four-channel receiver built around Sansui's Vario-Matrix decoding. The test also noted its separate front/back balance controls.

Sansui's own advertising fills in most of the rest. A HiFI-Stereo ad (January 1976, p.11) claimed the Vario-Matrix circuit could effectively decode all matrix-encoded four-channel records, tapes, and broadcasts in both SQ and QS formats. The same ad said the QRX-7001, along with the QRX-6001 and the new QRX-5001, also had a CD-4 demodulator. It priced the QRX-7001 at $880.00, above the QRX-6001 at $760.30 and the QRX-5001 at $600.00, which made it the costliest of the three in that listing. An earlier Sansui ad in HiFI-Stereo (July 1975, p.56) showed off the QRX-7001's special protector circuit as part of a line-wide reliability message.

What is not documented: no power output, distortion figures, dimensions, or weight appear in the available sources, and the published test details beyond the balance-control description are not preserved