Artisan workshop

Pioneer A27

Repair

Japan 1979

Power amplifier
Power 2 x 120 W, 8 Ohms
Power 2 x 180 W, 4 Ohms
Total harmonic distortion 0.012%
Total harmonic distortion 1 W 0.008%
Intermodulation distortion 0.006%
Frequency response +0 -1 dB 5Hz - 200kHz
Final input sensitivity 1 V, 50 kOhm
Damping factor 60 to 8 Ohms
Final signal to noise ratio 120 dB

Preamplifier
Phono MM input sensitivity 2.5 mV (max 300 mV) 10, 25, 50, 100 kOhms
Phono MC input sensitivity 0.25 mV (max 30 mV) 100 Ohms
Line input sensitivity 150 mV 50 kOhms
Total harmonic distortion 0.02%
Frequency response + 0, -1 dB 8 Hz - 100 kHz
Bass tone control ± 5 dB 100 Hz
Bass tone control ± 4 dB 50 Hz
Treble control ± 5 dB 10 kHz
Treble control ± 4 dB 20 kHz
Bass filter 15 Hz 6, 12 dB / oct
MM phono signal noise ratio 90 dB
MC phono signal to noise ratio 78 dB
Line noise signal ratio 100 dB
Muting -20 dB