McIntosh MC275 MK IV Stereo / Mono Tube Power Amplifier

McIntosh MC275 MK IV – Serial # VN2095 (2004-2007)

This amplifier is in excellent condition and was lightly used for about a year then put back in it’s original box for storage. The amplifier and box have matching serial numbers, original packing (double boxed), all tubes, owners manual and power cord.

This is the fourth generation of the classic and well loved design. It's also the oldest with balanced inputs, modern speaker connections, and a stainless steel chassis.

Specifications:

Power Output Stereo

Minimum sine wave continuous average power output per channel, both channels operating is:

75 watts into 4, 8 or 16 ohm load

Power Output Mono (Parallel)

Minimum sine wave continuous average power output is:

150 watts into 2 ohm, 4 ohm or 8 ohm load

Output Load Impedance

4, 8, or 16 ohm (Stereo Mode)

2, 4, or 8 ohm (Mono Mode)

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%

Intermodulation Distortion

Maximum Intermodulation Distortion if instantaneous peak output per channel does not exceed twice the rated output, for any combination of frequencies from 20Hz to 20,000Hz, with both channels operating is 0.5%

A-Weighted Signal To Noise Ratio

100dB

Frequency Response

+0, -0.25dB from 20Hz to 20,000Hz

+0, -3dBfrom 10Hz to 70,000Hz

Sensitivity

1.2 Volt unbalanced inputs

2.5 Volt balanced inputs

Wide Band Damping Factor

Greater than 14

Tube Compliment

3 - 12AX7A Inputs and Phase Inverters

4 - 12AT7 Voltage Amplifier and Drivers

4 - KT88/6550 Power Output

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 right side panel of the MC275 for the correct voltage.