Technics SH-3433 (1973–1975)
A four-channel audio scope for visualizing multichannel sound fields, waveforms, and phase alignment.
Overview
The Technics SH-3433 is a 4-channel audio scope designed to visualize the sound field of quadraphonic playback systems. It enables observation of waveforms and phase alignment across all four channels, aiding in system calibration and troubleshooting. The unit can also assist in optimizing FM antenna placement by analyzing multipath interference patterns.
Specifications
| External dimensions | 410 mm (W) × 140 mm (H) × 340 mm (D) |
| Weight | 6.6 kg |
| <4 ch AFD Part> Input Sensitivity / Impedance | Low: 15mV/cm, 25k Ω; High: 200mV/cm, 47k Ω |
| <4 ch AFD Part> Max Input | Low: 2V; High: 35V |
| Low: 15mV/cm, 100k Ω; High: 800mV/cm, 47k Ω | |
| Low: 2V; High: 35V |
Design
The SH-3433 visualizes the four-channel sound field, enabling waveform observation and phase checking for each channel. It can also be used to select the optimal FM antenna direction by analyzing multipath waveforms.
Market
An instruction manual reprint is available for purchase. The unit is considered uncommon by collectors, with average sale prices reported between $200 and $350. One listing notes a current asking price of $750.
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