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Marantz Model 3250

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Technic details

Specifications

Type:
Control amplifier
[Rated output / Impedance]
Pre Out:
1.5V / 220Ω
Tape Out:
180mV / 330Ω
[Input sensitivity / Impedance]
Microphone:
1.8mV / 47kΩ

Phono 1:
1.8mV / 47kΩ
Phono 2 (MC):
90μV / 40Ω
AUX, Tape:
180mV / 20kΩ
Input equivalent noise:
0.24μV (Phono 1, IHF-A)
Total harmonic distortion rate:
0.01%
Intermodulation distortion rate:
0.01%
Frequency response:
5Hz to 60kHz, ±1dB
20Hz to 20kHz, +0 -0.1dB
20Hz to 20kHz, ±0.2dB (RIAA deviation)
S / N Ratio:
98dB (Ref. to rated output and 775mV input, “A” weighted)
[Output Levels]
Tape Out:
775mV (Ref. 7.75mV at Phone inputs)
Pre Out:
1.5V (Ref. 180mV at AUX inputs)
4.2V (Ref. 500mV at AUX inputs)
[Output impedance]
Tape Out (Phono mode):
330Ω
Pre-Out:
220Ω
Tone controls:
Bass - ±10dB
Treble - ±10dB
Mid - ±6dB
High filter - 9kHz, 18dB / oct.
Low filter - 15Hz, 18dB / oct.
Optional:
Wood case WC-121 (Walnut finish, ¥ 6,000)
Wood case WC-121N (Mahogany finish, ¥ 11,000)
Power Requirements:
AC 120V, 60Hz
Power Consumption:
11W

Dimensions (W x H x D):
416 x 146 x 239mm
Weight:
6.5kg (Net)
7.9kg (Packed for Shipment)
Year:
1977

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