nad m2 amplifierThe NAD M2 Direct Digital Amplifier represents a new level of amplifier performance by combining the ultra low distortion and noise levels of the finest linear Class A and Class AB amplifiers with the efficiency and streamlined signal path of the digital amplifier, the M2 is the first implementation of a new amplifier technology called Direct Digital Feedback.


For Direct Digital Feedback to work correctly requires a very wide bit path and very high speed operation. The M2’s extremely wide 35-bit data path allows for compensation to be made without truncating any information in the original signal. Running from a master clock frequency of 108MHz there is enough speed to keep a very wide amplifier bandwidth and very low noise and distortion in the audio band.

The NAD M2 amplifier uses three power supplies, all of them highly efficient switch mode types. Each channel gets its own high current power supply in a dual mono configuration. The Input stage and control sections get their own dedicated supply with multiple regulated secondary voltages for individual sections.

NAD M2 Direct Digital Amplifier Features

  • Direct Digital Amplifier
  • 2 X 250W Continuous Power at 8 and 4 Ohms
  • >500W IHF Dynamic Power
  • <0.004% THD 20Hz – 20kHz from 500mW to 250W
  • >120dB Dynamic Range
  • 40uV Residual Noise
  • >2000 Damping Factor at 50Hz +0/-0.5dB Frequency Response 20Hz – 20kHz, -3dB >85kHz
  • Channel Separation >90dB @ 1kHz, 80dB @ 10kHz
  • Digital PowerDrive
  • Digital Soft Clipping (switchable)
  • 5 Position Digital Impedance Compensation Filter

M2 Analogue to Digital Conversion

  • A/D Conversion for Analogue Inputs
  • Multi-bit Delta/Sigma 24/216kHz
  • 0.0004% THD
  • Sample rate 32kHz – 192kHz
  • 124dB S/N Ratio
  • High Resolution 120dB Digital Attenuator

NAD M2 amp inputs and outputs

  • Inputs Digital SPDIF: AES/EBU, Coaxial X 2, Optical X 2
  • Inputs Analogue: Balanced, Single Ended
  • Processor Loop: SPDIF Optical (Mac PC compatible) out/in
  • 2 Sets of Speaker Binding Posts to facilitate Bi-wiring

M2 Control Options

  • RS-232 serial data port
  • IR Input
  • 12V Trigger Input and Output
  • <1W Standby Consumption
  • 90% Amplifier Efficiency

NAD M2 amplifier photos