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Equipment > Amplification > Power Amp > NAD - M22 v2 Hybrid Digital Stereo Power Amplifier
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NAD ELECTRONICS NAD - M22 v2 Hybrid Digital Stereo Power Amplifier

Power Amp

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Item: ANADM22V2

Always Have Plenty of Power in Reserve: Capable of Outputting 950Wpc, NAD Masters Series M22 v2 Hybrid Digital Power Amplifier Provides End-to-End Dynamics, Brings Out Emotionalism in Music

The mind-boggling power specifications – a minimum of 300Wpc, with up to 950Wpc capability in mono courtesy of a bridging switch – are just the beginning of the NAD Masters Series M22 v2 hybrid digital power amplifier. Fueled by a substantial redesign of the power supply and Hypex nCore hybrid digital technology, M22 v2 delivers highly detailed sound, iron-fisted control, end-to-end dynamics, and see-through transparency with reference-level efficiency. From a technical standpoint, it's a marvel. The superbly quiet M22 v2 features a wide open-loop bandwidth, low-phase shift, and a high damping factor at all audible frequencies. An all-discrete driver and output stage, input-to-output DC coupling, switch-mode power supply, and unique circuit topology complement a design that significantly lowers distortion across the entire audio band and runs amazingly cool. A new three-position input-sensitivity switch that controls the auto turn-on sensitivity, allowing for better matching to each individual system, further increases M22 v2’s flexibility. M22 v2's seemingly effortless performance both draws the emotionalism, detail, and richness out of high-resolution music and drives your speakers with the type of authority that can only be described as masterful. 100% Satisfaction Guaranteed.

Hybrid Digital Amplification via nCore Technology
M22 v2 uses 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. This is added to UcD's already amazing characteristics of load invariance and high current capability, common characteristics of great-sounding amplifiers.

Enormous Power, Effortless Performance
Employing the latest generation of digital PowerDrive circuitry, M22 v2 offers a minimum of 300W per channel with amazing reserves of dynamic power at lower impedances. M22 v2 is capable of >400W dynamic power per channel even in 8 ohms, >700W in 4 ohms, and 1,000W in 2 ohms. Need more power? Select Bridge Mode and M22 v2 offers 950W at 8 Ohms in Mono.  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 clipping power over a sustained loading. By controlling the power envelope maximum clean power is obtained for every operating condition.

Cutting-Edge Output Stage and Topology
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, but not too tight, custom switch-mode design. 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.

Continuous output power into 8 ohms and 4 ohms (Stereo mode): 300 W
Continuous output power into 8 ohms (Bridge mode): 900 W
THD+N (20 Hz – 20 kHz, CCIF IMD, SMPTE IMD, DIM 100): <0.005 %
Signal-to-Noise Ratio:
   >100 dB (A-weighted, ref. 1 W in 8 ohms)
   >120 dB (A-weighted, ref. 300W in 8 ohms)
Clipping power:
   Stereo mode, at 1 kHz 8 ohms 0.1 % THD: >300 W
   Bridge mode, at 1 kHz 8 ohms 0.1 % THD: >950 W
IHF dynamic power (Stereo mode, at 1 kHz 1 % THD):
   8 ohms: 400 W
   4 ohms: 700 W
   2 ohms: 1000 W
Damping factor: >800 (ref. 8 ohms)
Frequency response: ±0.1 dB (20 Hz – 20 kHz)
Input sensitivity (for 300W in 8 ohms): 1.73 V
Gain level:
   Low: 19 dB
   Medium: 24 dB
   High: 29 dB
Minimum input level for Auto Trigger: 5 mV at 1 kHz
Standby power: <0.5 W
Dimensions (WHD): 17 1/8" x 4 1/16" x 14 15/16"
Weight: 19.6 lbs.

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