HARMAN KARDON. Integrated amplifier, model “PM660”, 1980s.

Harman Kardon, integrated amplifier, model “PM660”, 1980s.
specifications
Power output: 80 W RMS per channel @ < 0.02% THD< primarily low order harmonics
Power Bandwidth: HALF POWER — 10 Hz — 100 kHz into 8 ohms
Frequency response: 4 Hz — 140 kHz +0, -3 dB
Rise Time: SQUARE WAVE — 1.8 usec (20kHz into 8 ohms at rated pwr output)
Slew rate: 80V/usec
Damping Factor: < 50
Signal-to-Noise Ratio:
AUX — 94dB, “A” WTD
PhonoMM — (Ref:5mV) 84dB, “A” WTD
PHONO MC — 74dB, “A” WTD
Phono Overload:
MM — 200mV
MC — 4.0mV
RIAA equalization: +/-0.7dB
Phono Input Sensitivity: 47k ohms/100pf
filters:
HIGHCUT — 6kHz, 12dB/octave
SUBSONIC — 15Hz, 12dB/Octave
Loudness Control:
+10dB @ 50Hz/+3dB @ 10kHz (volume at -40dB)
+5dB @ 50Hz/+1.5dB @ 10kHz (volume at -15dB)
Square Wave Tilt: < 5% (20Hz)

Dimensions: h. 12.5 cm. B. 44 cm T. 36 cm.