How to Connect in Mono Bridged Mode

Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC252 Amplifier until after the Loudspeaker Connections have been made and the supplied protective Terminal Connection Covers have been installed. Failure to observe this could result in Electric Shock.

There are two different ways of operating the MC252 mon- aurally, Mono Bridged Mode and Mono Bi-Amp (Parallel) Mode. The Mono Bridge Mode allows for Loudspeakers of 4S (ohm), 8S (ohm) or 16S (ohm) impedance to be con- nected to the MC252. The Mono Bi-Amp (Parallel) Mode allows for Loudspeakers of 1S (ohm), 2S (ohm) or 4S (ohm) impedance to be connected to the MC252.

Choose the appropriate Mono Mode determined by the impedance of your Loudspeakers. If the Mono Bi-Amp (Parallel) Mode is appropriate for the Loudspeakers, pro- ceed to page 12 for proper connections.

1.For Remote Power Control, connect a power control cable from the Control Center or Preamplifier Power Control Out to the MC252 Power Control In.

2.Connect cables from the Unbalanced Output of a McIn- tosh Preamplifier or Control Center to the MC252 Unbalanced R/MONO Input.

Note: An optional hookup is to use balanced cables.

3.Prepare the Loudspeaker Hookup Cables that attach to the MC252 Power Amplifier 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, or attach spade lug and/or banana connector.

Spade lug or prepared wire connection: Insert the spade lug connector or prepared section of the cable end into the terminal side access hole, and tighten the terminal cap until the cable is firmly clamped into the terminal so the wires cannot slip out. Refer to figures 4, 5 & 6.

Banana plug connection:

Insert the banana plug into the hole at the top of the terminal. Tighten the top portion of the terminal post and the set

screw to secure the banana plug in place. Refer to figures 7 and

8. Note: The use

of Banana Plugs is for use in the United States and Canada only.

4.Referring to the “Mono Bridge Hookup Connections” Chart on the next page, connect the Loudspeaker hookup cables to appropriate output terminals based on the impedance of the Loudspeaker (4S [ohm], 8S [ohm] or 16S [ohm]), being careful to observe the cor- rect polarities. If the Loudspeaker’s impedance is in- between the available connections, use the nearest lower impedance connection.

WARNING: Loudspeaker terminals are hazardous live and present a risk of electric shock. For additional instruction on making Loudspeaker Connections contact your McIntosh Dealer or McIntosh Technical Support.

5.Attach the supplied Terminal Connection Covers with the four Mounting Screws (6-32 x 1/4 inch Phillips Head) to the Rear Panel of the MC252 Amplifier. Refer to figure 9.

Note: The illustration in figure 9 is for the purpose of installing the Terminal Connection Covers, showing the opening on the covers for the Loudspeaker Cables to exit the MC252. It is not intended to show which terminal connections to use.

6.Connect the MC252 power cord to an active AC outlet.

Terminal Connection Covers

Cable Openings

Cover Mounting	Cover Mounting
Screw Locations	Screw Location
	Figure 9

MC252 specifications

The McIntosh MC252 is a legendary power amplifier known for its innovative approach to high-fidelity audio reproduction. As a part of McIntosh's esteemed lineup, this amplifier embodies the company's commitment to exceptional sound quality and timeless design.

One of the standout features of the MC252 is its dual mono design. This architecture not only enhances stereo imaging but also reduces crosstalk, providing a cleaner and more defined soundstage. Each channel operates independently, ensuring that each speaker receives precise and stable power, ideal for discerning audiophiles who demand the highest quality in their audio systems.

The MC252 is rated to deliver 250 watts per channel into 8 ohms, with a powerful peak at 300 watts into 4 ohms. This robust output makes it suitable for driving a wide range of speakers, from efficient bookshelf models to large floor-standing designs. The amplifier is designed to handle dynamic music and movie soundtracks with ease, delivering an engaging listening experience without distortion.

McIntosh's patented Power Guard technology is another hallmark feature of the MC252, designed to prevent clipping and distortion. This intelligent system monitors the output signal and automatically adjusts the power levels, ensuring the integrity of the audio signal is maintained even at high volumes. This feature guarantees that listeners can enjoy their music without fear of damaging their speakers.

The amplifier also incorporates a unique input and output circuitry that adheres to McIntosh’s time-honored values of craftsmanship and quality. The iconic blue watt meters not only serve a practical purpose, providing real-time feedback on power output but also add to the visual appeal of the unit, making it a centerpiece in any audio setup.

In terms of build quality, the MC252 features durable, high-quality aluminum and glass components that define McIntosh’s aesthetic. This attention to detail ensures longevity and a classic look that never goes out of style.

Overall, the McIntosh MC252 stands as a testament to the evolution of audio technology, offering robust performance, cutting-edge features, and a design ethos that honors tradition while embracing modernity. For audiophiles seeking a high-performance amplifier that delivers both power and finesse, the MC252 remains a compelling choice. Whether for home theater or music listening, its capabilities ensure an exceptional audio experience, making it a prized possession for any serious audio enthusiast.