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Nakamichi 610

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Technic details

Specifications

Type:
Control amplifier
Input sensitivity / impedance:
Mic. - 0.2mV / 1kΩ (attenuator - 15dB, 30dB)
Phono - 1mV / 200Ω, 50kΩ, 100kΩ changeover
Aux, Tuner - 75mv / 25kΩ
Tape PB - 230mV / 75kΩ
Tape monitor - 316mV / 75kΩ
Maximum input level:
Mic - 1V (+74db, attenuator - 30dB)
Phono - 250mV (+ 48dB)
Aux, Tuner, Tape PB - 50V
Reference output level (0dB) / output impedance / Load impedance:
Monitor out - 1V / 100Ω / 1kΩ or more
Line out - 316mV / 600Ω / 1kΩ or more
Rec out - 316mV / 2.2kΩ / 50kΩ or more
Headphone - 40mW / 8Ω / 8Ω to 200Ω
Maximum output level (clipping level):
Monitor out - 5V / 1kΩ
Line out - 5V / 10kΩ
Rec out - 5V / 50kΩ
Headphone - 300mW / 8Ω
Frequency characteristic:
Mic. - 30Hz to 100kHz, +0 -1.5dB
Phono (RIAA deviation) - 30Hz to 15kHz, ±0.3dB
Aux, Tuner - 20Hz to 100kHz, +0 -1.5dB
Tape PB - 10Hz to 50kHz, ± 0.3dB
Monitor out - 5Hz to 150kHz, +0 -1.5dB
[S / N ratio / Input conversion ratio]
Mic:
53dB or more (0dB) / -127 dB
65dB or more (Attenuator 15dB)
Phono:
80dB or more (1mV) / -140dB
90dB or more (3mV)
Aux, Tuner, Tape PB:
85dB or more (Vol max)
93dB or more (Vol min, input open)
[Residual noise level]
Headphone (8Ω):
4μV or less (Line out, IHF-A)
Line out / Rec out:
7μV or less (Vol max)
15μV or less (Vol -30dB)
[Distortion factor]
Mic:
0.01% or less (f = 10kHz or less, Vol - 20dB, Level vol max, Line out 2V)
Phono:
0.005% or less (f = 10kHz or less, Vol - 20dB, Level vol max, Line out 2V)
0.002% or less (f = 1kHz, Vol - 20dB, Level vol max, Line out 2V)
Aux, Tuner, Tape PB:
0.005% or less
[Test tone]
Oscillation frequency:
1kHz / 3.16kHz / 4.16kHz / 10kHz / 11kHz / 13.16kHz / 14.16kHz (Depending on switch combination)
Oscillator distortion ratio:
1kHz to 14.16kHz, 0.2% or less
Frequency response:
50Hz to 20kHz, +0 -1dB (-30dB to +10dB)
Semiconductor used:
FET's - 2 pieces
Transistors - 134 pieces
Diodes - 27 pieces
Zener diodes - 5 pieces
IC's - 2 pieces
Optional:
Remote control unit RM - 610 (¥ 18,000)
600 series embedded rack SYSTEM - ONE (¥ 25,000)
Wood cabinet for 600 series (¥ 11,000)
AC outlet Switched:
2 lines (350VA)
Power supply:
AC 100 - 120V / 220 - 240V, 50Hz / 60Hz
Power consumption:
Maximum 20VA
External dimensions: (W x H x D):
400 x 170 x 237mm
Weight:
About 7kg
Year:
1976

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