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  • NAD M22 Stereo Power Amplifier
  • $4199.00

NAD M22 Stereo Power Amplifier


Hybrid Digital Amplification

The M22 is using the latest nCore™ amplifier technology licensed from Hypex to provide a nearly ideal amplifier with distortion below measurement, ultra-high damping factor, and unconditional stability with any speaker. Tight, detailed sound with amazing control and transparency gets the best performance available. With nCore, Hypex has refined their UcD concept to new levels of perfection by improving the modulator for more accurate feedback subtraction and PWM generation. The all-discrete driver and output stage have also been improved for lower open-loop THD as well as lower idling losses, normally conflicting requirements with conventional IC driver circuitry. An added control loop incorporating an integrator with adaptive clipping enables 20dB more feedback to be used across the audio band because of its extremely low-phase shift resulting in a dramatic reduction in distortion across the audio band.

Effortless Power

The M22 employs the latest generation of digital PowerDrive™, which offers a minimum of 250W per channel with amazing reserves of dynamic power at lower impedances. It is capable of beyond 300W dynamic power per channel even in 8 Ohms, and beyond 600W in 2 Ohms. It can effortlessly power any loudspeaker to live performance levels with amazing efficiency and low power consumption. Control for PowerDrive is derived by sensing the average output power, applying a time constant, and then cleanly hard clipping the signal thus limiting it to the rated continuous power over a sustained load.

By controlling the power envelope maximum clean power is obtained for every operating condition.

Perfecting Performance

The output stage is only one of several circuits in the amplifier, and each must complement the other to obtain optimal performance. The amp is DC coupled throughout, from input to output, there is no capacitor in the forward signal path. Yet, it has a beneficial 12dB/octave roll-off below 2Hz. It does this using a unique circuit topology that is functionally a forward servo. It is however not a servo in the traditional sense as it does not measure DC at the output and send back a correction signal. Instead part of the input signal is fed to a side chain with a second order low-pass filter. The output of this is subtracted from the forward signal input to the second stage thus rejecting DC.

Clean and Dynamic

The performance of the entire signal path is critically dependent on the power supply; in this case a well-regulated, custom switch mode design is utilized. This allows maximum dynamic power, very high current yet with very low distortion. Secondary supplies are individually regulated and decoupled at each opamp for lowest possible noise and maximum dynamic range.

NAD M22 Stereo Power Amplifier


• Continuous output power into 8 Ohms and 4 Ohms (Stereo)

>250W (at rated THD, 20Hz-20kHz, both channels driven)


<0.003% (250mW to rated power, 8 Ohms and 4 Ohms)

Clipping Power (8 Ohms)

>300W (at 1kHz 0.1% THD)

IHF Dynamic Power 8 Ohms


4 Ohms


2 Ohms


Peak Output Current

>50A (ref. 1 Ohm, 1ms)

Signal/Noise Ratio, A-weighted, ref. 1W


A-weighted, ref. rated power


Damping Factor

>800 (ref. 8 Ohms, 50Hz and 1kHz)

Frequency Response

3Hz-30kHz (ref. -3dB)

Input Impedance RCA

17 kilohm + 200pF


200 kilohm + 100pF

Input Sensitivity

1.6V (ref. rated power)

Voltage Gain


Minimum Input Level for Auto Trigger

10mV at 1kHz


Standby Power


Idle Power


Unit Dimension (WxHxD) – Gross*

435 x 103 x 379mm

17 1/8 x 4 1/16 x 14 15/16 inches

Net weight

8.9kg (19.6lb)

Shipping Weight

15kg (33.1lb)

*Gross dimensions include feet, extended buttons and rear panel terminals

NAD M12 preamp and M22 amplifier review

NAD M22 stereo power amp review

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