TRIO KA-5006 ¥ 57,000 (released in 1974)

https: //audio-database.com/TRIO-KENWOOD/amp/ka-5006.html

Type Solid-state stereo premain amplifier
Power Amplifier Unit
Effective power
20 Hz to 20 kHz, both channel operation : 34W + 34W (8 Ω)
1 kHz Single channel operation : 56W/56W (4 Ω)
40W/40W (8 Ω)
Both channel operation : 48W + 48W (4 Ω)
35W + 35W (8 Ω)
Music Power (IHF) 145W (4 Ω)
95W (8 Ω)
Total harmonic distortion factor (8 Ω) 0.5% (at rated output)
0.05% (Rated Output -3dB)
Cross modulation distortion factor 0.5% (at rated output)
0.08% (Rated Output -3dB)
Output Bandwidth (IHF) 10 Hz to 40 kHz
Residual noise (8 Ω) 0.5mV
Damping factor (8 Ω) 32
Optimum load impedance 4 Ω ~ 16 Ω
Preamplifier Section
Input Sensitivity / Impedance Phono1, 2 : 2.5mV/50k Ω
Tuner, Aux, Tape playA, B : 150mV/50k Ω
4 ch input : 150mV/50k Ω
Signal-to-noise ratio (IHF-A network) Phono1, 2 : 82 dB (input 5 mV)
Tuner, Aux, Tape PlayA, B : 90 dB
4ch input:90dB
Output Level / Impedance Tape rec Pin : 150mV/50 Ω
Tape rec Din : 40mV/70k Ω
4 ch out : 150mV/50 Ω
Maximum Allowable Input (1 kHz, RMS) Phono:140mV
Frequency characteristic Tuner, Aux, and Tape play : 8 hz to 45 khz + 0 to 1.5 db
Phono : RIAA deviation ± 0.5 dB
Tone control Bass : ± 10 dB (100 Hz)
Treble : ± 10 dB (10 kHz)
Filter Low : 80 Hz, 6dB/oct.
High : 7 kHz, 6dB/oct.
Loudness control (Volume-30dB) +8dB(100Hz)
+3dB(10kHz)