How to Operate the MC275, Power On and Off

Figure 8

Figure 7

How to Operate the MC275

Power On and Off

Press the POWER switch to the ON position and sound will be heard from the Loudspeakers when the tubes have reached their operating temperature. The amount of time it takes is dependent upon the temperature of the Tubes. Press the POWER Switch to the Off posi-

tion to stop amplifying the audio signal. Refer to figure 7.

Note: If the MC275 is connected to a

McIntosh Preamplifier, Control

Center or A/V Center, the addition of a McIntosh

Power Controller such as a PC4 will allow the

MC275 to switch On and Off automatically.

Mode Switch

The MODE Switch, which is located on the Left Side Panel of the MC275, allows se-

lection of either Stereo or Mono (Parallel) Modes of Operation. Refer to figure 8 and pages 10 and 11 for connection information.

Input Switch

When BALANCED Input Connections are used, place the MC275 INPUT Switch to the

BALanced position. If UNBAL- ANCED connections are used, place the INPUT Switch to the UNBALanced position. Refer to figure 9.

Figure 9

Unbalanced Level Controls

The MC275 UNBALANCED Input Connections allow for adjusting the volume level of the incoming Audio Signal by using the

UNBAL-

ANCED LEVEL Con- trols, one for each of the channels. Refer to figure 10.

Figure 10

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.