SONY SQA-2030
¥ 44,800 (released in 1975)
Commentary
A 4-channel decoder with 3 SQ / ICs and a built-in back amplifier.
Uses F/B (front / back) logic that reduces front-center and rear-center crosstalk and W/M (waveform-matching) logic that significantly reduces corner crosstalk.
In addition, the use of SQ-IC enables stable 4-channel regeneration.
It has a built-in power amplifier for the back channel using hybrid power IC developed for audio.
It has built-in SQ and RM decoders, and discrete 4 ch is possible by using a demodulator for CD-4.
It is equipped with a 4-channel master volume. If the level of each channel is adjusted in advance, the volume can be adjusted with the master volume.
It is equipped with a mode switch and can be switched between 4 channels and monaural, so the level and phase of each channel can be adjusted.
Equipped with NF type tone control for back channel.
The front and back channels are equipped with effective loudness controls, enabling you to compensate for the high and low frequencies when listening at low volume.
Equipped with 2 sets of input level switching switches, 2 ch input can be switched between Low-Normal-High.
In addition, the tape input can be switched between Low and Normal.
Equipped with 2 ch tape monitor switch, recording and re-monitoring of 2 ch tape recorder is possible.
Equipped with 2 → 4 position, you can listen to the conventional 2 ch source with 4 ch hole cone effect.
Model Rating
| Type | Built-in back amplifier / SQD matrix 4-ch decoder | ||||||||
| Circuit system | SQ decoder (equipped with front back logic and wave form matching logic) Back-channel power amplifier : direct coupling method Quasi complimentary service SEPPP OTL circuit |
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| <Decoder Unit> | |||||||||
| Harmonic distortion factor | Front : 0.2% or less (input 250 mv, 2 khz) | ||||||||
| Frequency characteristic | SQ, R-MTX, 2 → 4 : 20 Hz to 20 kHz ± 3 dB Others : 20 Hz ~ 20 kHz + 0 -3dB |
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| Input Sensitivity / Impedance |
Rec PB (input section) : 250mV/80k Ω |
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| Output Level / Impedance | Front Output : 1 V (maximum 5.5 V) / 10k Ω Rec Output : 250mV/10k Ω Rec PB (Output) : 43mV/10k Ω |
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| SN ratio (SQ separation) | Front Out : 85 dB or more (Input 250 mV, A Network) LF-RF:20dB LB-RB:14dB LF-LB:20dB LF-RB:20dB RF-RB:20dB RF-LB:20dB CF-CB : 18 dB (input 250 mV, 2 kHz) |
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| Tone control | Bass : 100 Hz ± 10 dB Treble : 10 kHz ± 10 dB |
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| Loudness control | 50 Hz : + 10 dB, 10 kHz : + 4 dB (ATT 30 dB) | ||||||||
| Power Amplifier Unit | |||||||||
| Output (high-frequency distortion 0.8%) |
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| Output bandwidth | 10 Hz ~ 25 kHz (8 Ω, IHF Standard) | ||||||||
| Harmonic distortion factor | 0.8% or Less (Rated Output) 0.2% or Less (at 1W output) |
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| Cross modulation distortion factor (60Hz:7kHz=4:1) |
0.8% or Less (Rated Output) 0.2% or Less (at 1W output) |
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| Frequency characteristic | 20 Hz ~ 50 kHz + 0 -3dB (at 1W output, discrete input) | ||||||||
| Residual noise | 1.3 μ W or less (including tone amplifier) | ||||||||
| Signal-to-noise ratio | 90 dB (closed circuit, IHF A network, discrete input) | ||||||||
| Damping factor | 70 or More (8 Ω, 1 kHz) | ||||||||
| <General> | |||||||||
| Semiconductor used | Transistor : 27 IC : 5 Diode : 14 pcs |
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| Power supply voltage | 100 VAC, 50Hz/60Hz | ||||||||
| Power consumption | 62W | ||||||||
| Power outlet | Power switch not linked : 1 system, 300W | ||||||||
| External dimensions | Width 226x Height 156x Depth 307 mm | ||||||||
| Weight | 6.9kg | ||||||||
| Attachment | Connection code RK-74x2 | ||||||||