Technics SH-3433 (1973–1975)
A four-channel audio scope for viewing multichannel sound fields, waveforms and phase alignment.
Overview
The Technics SH-3433 is a 4-channel audio scope built to show the sound field of a quadraphonic playback system. You can watch the waveforms and check phase alignment on all four channels, which helps with calibrating and troubleshooting the system. It can also help place an FM antenna, since it shows 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 shows the four-channel sound field and lets you look at the waveform and check phase on each channel. Analyzing the multipath waveforms also lets you pick the best FM antenna direction.
Market
A reprint of the instruction manual is available for purchase. Collectors consider the unit uncommon. Average sale prices are reported between $200 and $350, and one listing currently asks $750.
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