How to Connect for Mono Parallel

1.Connect cables from the Balanced Output of a McIn- tosh Preamplifier or Control Center to the MC275 Right Balanced Input.

Note: An optional hookup is to use unbalanced cables.

2.Prepare the Loudspeaker Hookup Cable and Jumper Wires for connection to the Power Amplifier Output Terminals; two 4-1/2 inch (11.43 cm) Jumper Wires, and one Loudspeaker Hookup Cable cut to the desired length. Prepare the cable and wires by choosing one of the methods below:

Bare wire cable ends:

Carefully remove sufficient insulation from the cable ends, refer to figures 1, 2 & 3. If the cable is stranded, carefully twist the strands together as tightly as pos-

sible.

Note: If desired, the twisted ends can be tinned with solder to keep the strands together.

Spade lug or prepared wire connection:

Insert the spade lug connector or prepared section of the cable end under the terminal strip screw and tighten the screw until the cable is firmly clamped into the ter-

minal strip so the

wires can- not slip

out. Refer to figures 4, 5 & 6.

3.Connect the hookup cables to the output terminals that match the connections in the chart below, being careful to observe the correct

polarities. Output im- pedance connections

4ohm Loudspeaker

Jumper Cables

of 2S (ohm), 4S (ohm) and 8S (ohm) are provided. If the Loudspeaker’s impedance is in-between the avail- able connections, use the nearest lower impedance con- nection.

4.Place the MC275 POWER Switch to the OFF Position and connect the supplied power cord to an active AC outlet.

5.Refer to page 13 for the correct settings of the MODE and INPUT Switches.

Mono (Parallel) Hookup Connections

Loudspeaker	Loudspeaker Negative	Loudspeaker Positive
Impedance	(-) Connection	(+) Connection

2S (Ohm)	Left and Right Output 4S	Left and Right Output 4S
2S (Ohm)	Negative (- ) Connection	Positive (+ ) Connection
	Negative (- ) Connection	Positive (+ ) Connection

4S (Ohm)	Left and Right Output 8S	Left and Right Output 8S
4S (Ohm)	Negative (- ) Connection	Positive (+ ) Connection
	Negative (- ) Connection	Positive (+ ) Connection

8S (Ohm)	Left and Right Output 16S	Left and Right Output 16S
8S (Ohm)	Negative (- ) Connection	Positive (+) Connection
	Negative (- ) Connection	Positive (+) Connection

McIntosh Preamplifier

Refer to page 13 for the correct switch settings

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.