Technics SH-AV11 (c. 1987)
The Technics SH-AV11 is a surround processor from around 1987, documented primarily by a single Japanese source, audio-heritage.jp. It was designed as a record-jacket-sized unit, 31.5cm wide, meant to sit alongside an existing amplifier and add surround capability. A built-in rear-speaker amplifier delivered 7W+7W into 8Ω. The rear panel offered tape/TV, VTR, and VHD inputs, so you could add extra input paths to an amplifier without replacing it.
Controls were straightforward: a slide-type master volume, an effect volume for adjusting the amount of surround, a surround on/off switch, and a stereo/mono switch. The rest of the known specification:
- Input sensitivity/impedance: 150mV / 27kΩ
- S/N ratio: 95dB (line in to line out)
- Frequency response: 20Hz–20kHz, +0 / −0.2dB
- Surround output: 7W + 7W (8Ω)
- Power consumption: 22W
- Dimensions: 315 × 50 × 236mm; 2.2kg
- Original price: ¥24,800 (circa 1987)
No production years, lineup placement, or period reviews have surfaced so far. The only market data point found is a single Japanese auction-proxy listing at ¥1,000. The record is thin, but the SH-AV11 appears to be a genuine late-1980s Technics surround processor.
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