Technics SH-AV33 (c. 1987)
Documentation on the Technics SH-AV33 is thin. Nearly everything known about it comes from a single Japanese reference listing. That listing identifies it as a surround processor from around 1987, priced at ¥39,800. It was a compact, feature-dense AV component for the late-1980s Japanese domestic market.
It had three surround modes - Music, Movie, and Manual, which you adjust to taste. It also had a surround on/off switch and a stereo/mono switch. The built-in rear amplifier delivered 22W + 22W into 8 ohms (EIAJ, 1kHz) for the surround speakers. A switch on the rear panel could send that amp to the front speakers instead. A built-in AV selector meant switching the processor input switched video and audio together. A BGV function let you take video from one source and audio from another. The source notes six input terminals.
Known specifications:
- Input sensitivity / impedance: 150 mV / 47 kΩ
- Signal-to-noise ratio: 90 dB (IHF, surround off)
- Frequency response: 5 Hz – 50 kHz, +0 / −3 dB
- Surround output: 22W + 22W (8 Ω, 1 kHz, EIAJ)
- Power: AC 100V, 50/60 Hz; 42W consumption
- Dimensions: 430 × 86.5 × 249 mm; 3.8 kg
The 100V power supply marks it as a Japan-market unit. A Polish classified listing of one explicitly notes "JAPAN 100V." No reviews, owner impressions, or used-market values have surfaced, and the exact production run isn't documented.
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