VICTOR/JVC JA-S55
¥ 65,000 (around 1978)

Made In Japan
https:
//audio-database.com/VICTOR/JVC/amp/ja-s55.html

Type Pre-main amplifier
Power Amplifier Unit
Circuit system Fully connected full DC amplifier
Effective output (when both channels operate) 60W + 60W (8 Ω, 20 Hz to 20 kHz, THD0.02% or less)
70W + 70W (4 ohm, 1 khz, THD0.05%)
Total harmonic distortion factor 0.02% or Less (8 Ω at Effective Output, 20 Hz to 20 kHz)
0.005% or Less (1 kHz)
Cross modulation distortion factor 0.01% or Less (8 Ω at Effective Output)
Frequency characteristic 5 Hz ~ 100 kHz + 0 -1dB from Aux Input
Preamplifier Section
Circuit system All stages DC configuration, first stage FET differential ICL, class A operation
Input Sensitivity / Impedance Phono : 2.5mV/47k Ω
Tuner, Aux, Tape play : 200mV/50k Ω
RIAA deviation 20 Hz to 20 kHz ± 0.3 dB
Phono maximum allowable input 230 mv (RMS, 1 kHz)
Frequency Response (Aux) 5 Hz to 100 kHz + 0 -1dB
SN ratio (IHF-A short circuit) Phono:81dB
Aux:105dB
Power Supply Unit and Others
Circuit system Class A and Class B Independent, direct power supply system
Rated power consumption (Electrical Appliance and Material Control Law) 154W
External dimensions Width 420x Height 149x Depth 334 mm
Weight 10.0kg

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