NAD M2 amplifier

amplifier — Mon, 16 Apr 2012 11:21:40 +0000

The 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