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Accuphase C-220

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Technic details

Specifications

Type:
Disk dedicated preamplifier
Frequency response:
20Hz to 20kHz, ± 0.2dB
Harmonic distortion factor:
0.01% (20Hz to 20kHz, rated output)
Rated input / impedance:
DISC 1, 2 (Head amp off) - 2mV / 100Ω, 30kΩ, 47kΩ, 100kΩ
DISC 1, 2 (Head amp on) - 0.1mV / 100Ω

Rated output / impedance:
Main output - 2V / 50Ω (Volume maximum, rated input)
Fixed output - 150mV / 200Ω
Minimum load impedance:
Main output - 5kΩ
Fixed output - 10kΩ
S / N:
Head amp off - 85dB (input short, IHF-A curve, at rated input)
Head amp on - 72dB (input short, IHF-A curve, at rated input)
Input conversion noise:
Head amp off - -139 dBV (Input short circuit, IHF-A curve)
Head amp on - -152 dBV (Input short circuit, IHF-A curve)
Maximum input (1kHz, distortion rate 0.01%):
Head amp off - 400 mV rms
Head amp on - 20 mV rms
Minimum input level:
10 Vrms (20Hz to 20kHz, distortion rate 0.01%)
Gain (DISC input → Main output):
Head amp off - 60dB
Head amp on - 86dB
Volume adjustment interlock error within:
1dB
Balance adjustment:
0, -0.5, -1, -1.5, -2, -3, -4, -5, -6, -7dB, -∞ (both left and right)
Semiconductor used:
Transistors - 109
FET - 16 pieces
Diode - 34 pieces
Power supply voltage:
AC 100V / 117V / 220V / 240V, 50Hz / 60Hz
Power consumption:
65W

External dimensions:
A type (W x H x D) - 482 x 82 x 345mm
B type (W x H x D) - 445 x 82 x 349mm
Weight:
10.7 kg
Year:
1977

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