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McIntosh Model C 28

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Technic details

Specifications

Type:
Solid State Stereo Pre Amplifier
Frequency Response:
20Hz to 20kHz,+0 -0.5dB
Distortion:
Less than 0.1% at each output at rated output level (20Hz to 20kHz)
Hum and Noise:
90dB below rated output (AUX, Tuner, Tape 1 and Tape 2)
78dB below 10mV input, equivalent to less than 1,2µV at the input terminals (Phono 1, Phono 2 and Tape Head)

Input Sensitivity / Impedance:
2mV / 47kΩ (1kHz, Phono 1 and Phono 2)
0.25V / 250kΩ (AUX, Tuner, Tape 1 and Tape 2)
2.5mV / 500kΩ (Microphone)
2mV / 500kΩ (Tape Head)
Output Level / Impedance:
2.5V / Less than 100Ω (Main Output)
0.25V / Less than 150Ω (Tape Output)
0.75V / 8Ω (Headphone)
3V / 600Ω (Line)
Bass Control:
±20dB at 20Hz
Treble Control:
±18dB at 20kHz
L.F. Filter:
Flat or roll off above 50Hz, active filter 12 dB / oct. down 18dB at 20Hz
H.F. Filter:
Flat or roll off above 7kHz, active filter 12 dB / oct. down 20dB at 20kHz
Power Requirements:
AC 117, 50 / 60Hz
Power Consumption:
45W

Dimensions (W x H x D):
381 x 127 x 330mm (Chassis measures)
Dimensions (W x D):
406.4 x 138 (Front Panel measures)
Weight:
11.34kg (Net)
16.78kg (Shipping)
Year:
1970

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