Mitsubishi DA-U680

Mitsubishi DA-U680

Repair

Japan 1978

Power amplifier
Power 2 x 80 W 8 Ohms
Power 2 x 110 W 4 Ohms
Total harmonic distortion 0.005%
Intermodulation distortion 0.1%
Power bandwidth 10 Hz - 70 kHz
Frequency response (0.5w) +0 -1 dB DC 0 Hz - 100 kHz
1 V input sensitivity
Input impedance 50 kOhms
Damping factor 60 8 Ohms Signal to noise ratio 109 DB

Preamplifier
Phono input sensitivity mm 2.3 mV 50 kOhms (max 290 mV)
Phono input sensitivity mc 0.1 mV 10 Ohms (max 10 mV)
Line input sensitivity 150 mV 50 kOhms
Pre output level 1 V
Internal impedance pre output 600 Ohms
Phono signal to noise ratio mm 84 dB
Phono signal noise ratio mc 77 dB
Line noise signal ratio 92 dB
Harmonic distortion phono input 0.005% mm
Harmonic distortion phono input mc 0.01%
Harmonic distortion line input 0.004%
Bass tone control ± 10 dB at 100 Hz
Treble control ± 10 dB at 10 kHz
Filtro subsonico 18 Hz 6 dB/oct