Specifications

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 instanta- neous peak output per channel does not exceed twice the rated output, for any combination of fre- quencies from 20Hz to 20,000Hz, with both chan- nels operating is 0.5%

A-Weighted Signal To Noise Ratio 100dB

Frequency Response

+0, -0.5dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 70,000Hz

Sensitivity

1.2Volt unbalanced inputs

2.5Volt 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.

Overall Dimensions

Width is 16-1/2 inches (41.91cm)

Height is 8-1/4 inches (20.96cm) including feet Depth is 12 inches (30.48cm)

Weight

67 pounds (30.5kg) net, 75 pounds (34.lkg) in shipping car- ton

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McIntosh MC275 owner manual Specifications, Power Output Stereo

MC275 specifications

The McIntosh MC275 is a legendary vacuum tube amplifier that has maintained its reputation for delivering exceptional sound quality since its introduction in the 1960s. This iconic amplifier represents the pinnacle of audio engineering, combining vintage aesthetics with modern technologies to cater to discerning audiophiles.

At the heart of the MC275 lies its push-pull quad output configuration, powered by a pair of KT88 vacuum tubes that produce up to 75 watts per channel. This setup is renowned for its ability to provide a rich, warm sound with an impressive dynamic range. The combination of vacuum tube warmth and solid-state precision results in an audio experience that is both engaging and detailed, making it suitable for a wide array of musical genres.

One of the standout features of the MC275 is its unique quad-balanced design. This architecture minimizes distortion and maximizes clarity, allowing the amplifier to engage with the very essence of the audio signal. The implementation of a high-fidelity transformer enhances the low-frequency response, ensuring that bass notes are robust yet controlled.

The MC275 also showcases McIntosh's innovative Autoformer technology. This proprietary feature allows the amplifier to deliver the full rated power into 2, 4, or 8-ohm speakers without compromising audio quality. This versatility ensures compatibility with a wide range of loudspeakers, making it a perfect choice for both small setups and larger audio systems.

Additionally, the MC275 is equipped with McIntosh's signature Power Guard circuitry, which prevents clipping and distortion by monitoring the output signal in real-time. This feature safeguards both the amplifier and connected speakers, ensuring that listeners can enjoy loud volumes without concern for damaging equipment.

The amplifier's stunning design includes a striking illuminated analog meter, providing visual feedback on output levels. The classic black glass front and chrome chassis not only exude elegance but also emphasize McIntosh's rich heritage in high-fidelity audio.

In conclusion, the McIntosh MC275 is a remarkable fusion of classic and modern technology, offering audiophiles a powerful and aesthetically pleasing amplification option. With its impressive power output, advanced technology, and iconic design, the MC275 continues to be a sought-after choice for those who appreciate the art of sound.