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Technics SU-4

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Description:AMPLIFIER SECTION
40Hz~20kHz continuous power output both channels driven: 2 x 18watts (8ohms)
1kHz continuous power output both channels driven: 2 x 20watts (8ohms)
Total Harmonic Distortion
rated power at 40Hz~20kHz: 0.8% (8ohms)
rated power at 1kHz: 0.8% (8ohms)
half power at 1kHz: 0.05% (8ohms)
Intermodulation Distortion
rated power at 60Hz: 7kHz=4:1, SMPTE, 8ohms: 0.8%
Power Bandwidth
both channels driven, -3dB: 10Hz~25kHz (8ohms)
Residual hum and noise: 0.5mV
Damping factor: 27 (8ohms)
Input Sensitivity and Impedance
PHONO: 2.5mV/47kOhms
TUNER, AUX/CD/VIDEO: 150mV/22 kOhms
TAPE: 150mV/22 kOhms
PHONO maximum input voltage (1kHz, RMS): 150mV
S/N
rated power 8ohms
PHONO: 68dB (IHF, A: 72dB)
TUNER, AUX/CD/VIDEO, TAPE: 92dB (IHF, A: 97dB)
Frequency Response
PHONO: RIAA standard curve +/- 0.8dB (30Hz~15kHz)
TUNER, AUX/CD/VIDEO, TAPE: 10Hz~60kHz (-3dB)
Tone Controls
BASS: 50Hz, +10dB~-10dB
TREBLE: 20kHz, +10dB~-10dB
Output Voltage and Impedance
REC OUT: 150mV
Channel balance AUX/CD/VIDEO 250Hz~6,300Hz: +/-1dB
Channel separation, AUX/CD/VIDEO 1kHz: 45dB
Headphones output level and impedance: 360mV/330ohms
Load Impedance: 8ohms-16ohms

GENERAL
Power consumption: 93 watts

Note:
Total harmonic distortion is measured by the digital spectrum analyser (H.P. 3035 system).
Dimensions:315 x 48 x 240mm (W x H x D)
Weight:3.1kg / 6.82lbs
Year:1980 - 1982

Rating: 10.00 out of 10
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