YAMAHA CA-X1
¥ 49,500 (around 1976)
Made In Japan
https: //audio-database.com/YAMAHA/amp/ca-x1.html

Type Pre-main amplifier
Effective output (1 kHz, both channel drive) 45W + 45W (8 Ω)
62W + 62W (4 Ω)
Dynamic Power (IHF) 125W (8 Ω)
190W (4 Ω)
Total harmonic distortion factor 0.01% (20 Hz to 20 kHz, 20W)
0.005% (1 kHz, 20W)
Power bandwidth (IHF) 10 Hz to 50 kHz
Damping factor 50 or More (1 kHz, 8 Ω)
Phono input sensitivity 2.5mV
Phono maximum allowable input 150mVrms(1kHz)
RIAA deviation ± 0.3 dB
Tone control Bass : ± 12 dB (50 Hz)
Treble : ± 10 dB (10 kHz)
Low filter 25 Hz, 12dB/oct.
Loudness Switch-type
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 105W
External dimensions Width 435x Height 160x Depth 345 mm
Weight 8.7kg