NAD M2 Specifications

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> Advanced Power SuppliesThe M2 uses three power supplies, all of them highlyefficient switch mode types. Each channel gets its ownhigh current power supply in a dual mono configuration.The Input stage and control sections get their owndedicated supply with multiple regulated secondaryvoltages for individual sections.> Analogue Input SectionWe have provided a state-of-the-art Analogue-to-Digitalconverter stage for analogue sources and for those whostill choose to use a traditional analogue preamplifier.This fully balanced stage accepts both a Single Endedinput and a Balanced XLR input. Both the analogueinput buffer amp and the ADC are of the highest qualityavailable today.> Digital Soft ClippingDigital Soft Clipping prevents the harsh sound andpotential speaker damage that can result with a severelyoverdriven amplifier.> Dynamic PowerDigital PowerDrive optimizes performance when drivingreal loudspeakers by maintaining optimum powerdelivery and lowest possible distortion. Unlike mostdigital amplifiers that do not have power reserves, theM2 has excellent dynamic power capabilities.> Digital Processor LoopThis unique feature allows the advanced user to insertexternal digital filters into the signal path. The OpticalTosLink format allows fuss-free connection to Macswhere there is a wide library of crossover filters androom correction programs. Digital outputs in both coaxialand optical formats allow for multiple M2s for bi- ortri-amplification of advanced loudspeaker systems.> Effective ControlAn RS-232 serial interface is flexible for homeand studio use, allowing the M2 to be controlledfrom the PC or via advanced control systems likeCrestron and AMX.Features continuedDirect Digital ExplainedA true digital amplifier can be thought of as a Digital-to-Analogue Converter that directly drives the loudspeaker.This describes the M2 perfectly, except to say that the M2 actually has the same level of precision as the very best lowlevel DACs! This technology is far more sophisticated than the Class D analogue amplifiers that are often erroneouslyreferred to as ‘digital’ amplifiers.This level of performance is unprecedented and is made possible by application of Direct Digital Feedback.The idea of a closed loop digital amplifier is not new, but the NAD M2 is the first practical implementation of the concept.Feedback ReinventedThe concept of feedback is simple yet brilliant. Compare the signal at the output of the amplifier with the signal at theinput; any difference is caused by the distortion of the amplifier. Now, invert that difference signal and add it to theincoming signal and the difference signal will offset and cancel out the distortion. This is how it’s done in conventionallinear amplifiers.

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