McIntosh MC122

Commentary

A stereo power amplifier with high sound quality while maintaining high reliability through various guard systems.

The power guard function constantly compares the input and output signal waveforms. When a difference of 0.3% or more is detected, the gain is automatically lowered to prevent abnormal operation. A safe overdrive of 14 dB is guaranteed until the output distortion exceeds 2%.
In addition, reliability is enhanced by circuits such as the Sentry Monitor, which protects the output stage, and temperature protection, which prevents overheating and realizes a long life.

High speed is achieved by cascade connection of driver stages.

The input level control on the rear panel allows fine adjustment of each channel.

Model Rating

Type	Stereo power amplifier
Rated output (continuous sine wave)	120W + 120W (4 Ω) 80W + 80W (8 Ω)
Output load impedance	4 Ω, 8 Ω
Rated power band	20 Hz to 20 kHz
Dynamic head room	1.6dB
Frequency characteristic	20 Hz ~ 20 kHz + 0 -0.25 dB 10 Hz ~ 100 kHz + 0 -3dB
Total harmonic distortion factor	0.005% or Less (250 mW ~ Rated Output, 20 Hz ~ 20 kHz, When Both Channels Are Driven)
Cross modulation distortion factor	0.005% (20 Hz to 20 kHz, both channels driven, per channel, when the instantaneous peak is less than twice the rated output)
Signal-to-noise ratio	110 dB (below rated output)
Input sensitivity	0.8 V (2.5 V, level control center click position)
Input impedance	10k Ω
Damping factor	100 or Less (4 Ω) 200 or Less (8 Ω)
External dimensions	Width 445x Height 92x Depth 445 mm
Weight	10.9kg