The Masters M28 uses Eigentakt™ amplifier technology , manufactured by NAD under license from Purifi. This new technology, which NAD was the first to embrace for the M33 Masters Series Streaming Amplifier , adds another level of precision by taking into account previously unknown effects of the output filter in the feedback loop and further refinement of the self-oscillating Class D technology as used by previous NAD Hybrid Digital designs. The result is a performance level that approaches the theoretical limit in measured performance, be it at whispering levels or at full power.
