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Nakamichi 420

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Technic details

Specifications

Type:
Stereo Power Amplifier
Power Output:
60W per channel into 4Ω (Stereo, 5Hz to 20kHz, with less than 0.05% THD)
50W per channel into 8Ω (Stereo, 5Hz to 20kHz, with less than 0.02% THD)
25W per channel into 16Ω (Stereo, 5Hz to 20kHz, with less than 0.02% THD)
Damping Factor:
Greater than 100 (1kHz, 8Ω)

IHF Power Bandwidth:
5Hz to 100kHz for less than 0.1% THD
5Hz to 25kHz for less than 0.01% THD
5Hz to 10kHz for less than 0.005% THD
Total Harmonic Distortion:
Less than 0.02% @ 1kHz or below
Less than 0.008% @ 10kHz or below
Intermodulation Distortion:
Less than 0.002% (60Hz: 7kHz, 4:1, 8Ω load, 50W output)
Frequency Response:
5Hz to 50kHz, +0 -1dB
Input Sensitivity:
1V
Input Impedance:
10kΩ
Residual Noise Level:
Less than 50µV (IHF-A)
Signal-to-Noise Ratio:
Better than 110dB at rated output (IHF-A, input shorted)
Crosstalk:
Better than -70dB @ 1kHz
Power Source:
AC 110 / 117 / 220 / 240V, 50 / 60Hz
Power Consumption:
30W (At idling)
400W (With both channels driven to clipping into 8Ω load)

Dimensions (W x H x D):
400 x 80 x 225mm
Weight:
7kg
Year:
1976

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