Figure 16
Input Test Signal
Figure 15

The special Balanced Dual Core Autoformer creates an ideal match between the power amplifier output stage and the loudspeaker. A McIntosh amplifier with an Autoformer can be used to safely drive multiple speakers without re- ducing the life expectancy of the power amplifier. Refer to figure 13.

Figure 13

There is absolutely no performance limitation with an Autoformer. Its frequency response exceeds that of the out- put circuit itself, and extends well beyond the audible range. Its distortion level is so low it is virtually impossible to measure.

In the rare event of a power amplifier output circuit fail- ure, the McIntosh Autoformer provides absolute protection from possible damage to your valuable loudspeakers. The unequaled expertise of McIntosh in the design and manu- facturing of Autoformers is legendary in the high fidelity industry. McIntosh engineers know how to do it right.

Figure 14

Power Output Meter

The McIntosh MC1201 has a huge hand built Output Watt Meter that responds 95% full scale to a single cycle tone burst at 2kHz. Refer to figure 14. Voltage and current out- put are electronically measured, multiplied and fed to a special circuit that accelerates the pointer movement in the upward direction. When the pointer reaches its peak it pauses only long enough for the human eye to perceive its position, then drops. It is almost 10 times faster than a pro- fessional VU meter.

A front panel switch is provided to change the meter to the Watts Hold Mode of operation. This allows fast upward movement of the pointer but greatly increases Hold Time at the peak of its travel. The highest power output of the source material is thus recorded.

Protection Circuits

The MC1201 incorporates a version of the McIntosh Sen- try Monitor Output Transistor Protection Circuit. Refer to Figure 15. There is absolutely no compromise in sonic per- formance with this

circuit, and it en- sures safe opera- tion of the ampli- fier under even the most extreme oper-

ating conditions. The different types

of protection cir- cuits incorporated

in the MC1201 in- sure a long and safe operating life.

This is just one of

the many characteristics of McIntosh Power Amplifiers that make them world famous.

The MC1201 also includes the unique patented McIn- tosh Power Guard circuit.

Power Guard eliminates the possibility of ever overdriving the amplifier into clipping. Refer to figures 16, 17 and 18. An overdriven amplifier can produce both audible and inaudible distortion levels exceeding 40%. The au- dible distortion is un- pleasant to hear, but the inaudible ultrasonic dis- tortion is also undesir-

14

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Image 14
McIntosh MC1201 manual Power Output Meter, Protection Circuits
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MC1201 specifications

The McIntosh MC1201 is a high-performance monaural amplifier that exemplifies the brand’s commitment to delivering exceptional audio quality and performance. Known for its robust build and advanced technology, the MC1201 is designed to impress audiophiles and music professionals alike.

At the core of the MC1201 is a power output of 1,200 watts, allowing it to effortlessly drive even the most demanding speakers. The amplifier features McIntosh’s renowned Autoformer technology, which ensures that the full power is available regardless of the speaker's impedance. This technology helps in maintaining sound quality and performance across various load conditions, making the MC1201 versatile for different audio setups.

One of the standout characteristics of the MC1201 is its unique Circuit Design, including the use of McIntosh's exclusive Power Guard system. This innovative technology monitors the output to prevent distortion, safeguarding both the amplifier and connected speakers from damage during high-volume playback. This feature is especially beneficial for those who push their audio systems to the limits, providing peace of mind without sacrificing sound quality.

The MC1201 also incorporates the company’s proprietary Sentry Monitor, a protection circuit that ensures the amplifier operates safely under all conditions. If the output current exceeds safe levels, the Sentry Monitor will engage and temporarily reduce power output, allowing the amplifier to cool down and return to normal operation.

In addition to its powerful performance, the MC1201 boasts an aesthetically pleasing design. It features a sleek black glass front panel, illuminated meters that provide a visual representation of the audio output, and the iconic McIntosh logo, which signifies quality and luxury. The high-quality build ensures longevity and reliability, essential for both home audio enthusiasts and professional settings.

With its combination of power, advanced technology, and meticulous craftsmanship, the McIntosh MC1201 remains a sought-after choice for those seeking top-tier amplification solutions. Whether used in a home theater system or a high-fidelity audio setup, the MC1201 delivers an unparalleled listening experience, exemplifying McIntosh’s dedication to excellence in audio engineering.
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