McIntosh MA2275

22
Specifications
Specifications
Power Output
Minimum sine wave continuous average power output per
channel, both channels operating is:
75 watts into a 2 ohm load
75 watts into a ohm load
75 watts into an 8 ohm load
Rated Power Band
20Hz to 20,000Hz
Total Harmonic Distortion
Maximum Total Harmonic Distortion at any power
level from 250 milliwatts to rated power output is:
0.5% for a 2, 4 or 8 ohm load
Frequency Response
+0, -0.5dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 50,000Hz
Sensitivity
Phono: 4.4mV for 2.5V rated output
High Level: 450mV for 2.5V rated output
Power Amplifier Input: 2.5V for rated output
A-Weighted Signal To Noise Ratio
Phono Input: 80dB below 10mV input
High Level: 97dB below rated output
Power Amplifier: 110dB below rated output
Intermodulation Distortion
Maximum Intermodulation Distortion if instanta-
neous peak output does not exceed twice the rated
output, for any combination of frequencies from
20Hz to 20,000Hz is:
0.5% for a 2, 4 or 8 ohm load
Input Impedance
Phono: 47K ohms, 65pF
High: Level, 22K ohms
Maximum Input Signal
Phono: 90mV
High Level: 8V
Preamplifier Maximum Voltage Output
Phono: 8V
High Level: 8V
Main Out: 8V at preamp output
Voltage Gain
High Level to Tape: 0dB
High Level to Main: 15dB
Wide Band Damping Factor
Greater than 18
Power Requirements
100 Volts, 50/60Hz at 3.6 amps
110 Volts, 50/60Hz at 3.6 amps
120 Volts, 50/60Hz at 3.6 amps
220 Volts, 50/60Hz at 1.8 amps
230 Volts, 50/60Hz at 1.8 amps
240 Volts, 50/60Hz at 1.8 amps
Note: Refer to the rear panel of the MA2275 for the correct
voltage.
Preamplifier Tube Compliment
2 - 12AX7A Phono Circuitry
2 - 12AX7A High Level Circuitry
Power Amplifier Tube Compliment
2 - 12AT7
4 - KT88/6550
Overall Dimensions
Width is 17-3/4 inches (45.09cm)
Height is 10-1/8 inches (25.72cm) including feet
Depth is 18-3/4 inches (47.63cm) including the Front Panel
and Knobs
Weight
77 pounds (35 kg) net, 110 pounds (50 kg) in shipping car-
ton