Sony STR-VX22 (c. 1982–83)

Documentation on the Sony STR-VX22 is thin — no owner's manual or service literature seems to have survived in the usual archives, so what we know comes mainly from a couple of period write-ups. It was a modestly powered stereo receiver from the early 1980s: HI-Fi-Stereo-Buyers (1983, p.33) ran its full spec sheet, and Audio (October 1982, p.51) included the model in the magazine's receivers roundup the year before.

The headline number is 24 watts per channel RMS into 8 ohms, 20 Hz–20 kHz, at 0.08% THD and IM — an honest entry-level figure. The circuitry was a bit more interesting than the power rating suggests: the audio path is built from discrete components, the tuner's RF stage uses a dual-gate MOSFET input, and the FM section employs linear-phase ceramic IF filters, a double-tuned quadrature detector, and a PLL multiplex demodulator. Front-panel controls were straightforward pushbuttons for tape monitor, AM, FM, phono, and AUX, plus loudness and FM mute switches.

Known specs from the HI-Fi-Stereo-Buyers listing:

Output: 24 W/ch RMS into 8 Ω, 20 Hz–20 kHz, 0.08% THD and IM
Clipping / dynamic headroom: 1.53 / 2.0 dB
Damping factor: 40 at 8 Ω
Input sensitivity: 2.5 mV phono; 150 mV tape and AUX
Phono overload: 140 mV
S/N ratio: 91 dB phono, 100 dB AUX
Frequency response: 8–40,000 Hz ±0.5 dB

The tuner-side measurements in the surviving scan are cut off mid-figure, so this page is knowingly incomplete. If you have an STR-VX22 manual, brochure, or a complete copy of that 1983 listing, the Archive would love to hear from you.