![]() ![]() ![]() NAD describes the Masters M33 as a BluOS streaming DAC-amplifier. Too bad that’s not part of my job description . . . Rather than describe each of the Masters M33’s many features, it would be far easier, if not as informative, to list the handful of things it doesn’t do. The result is one of the most forward-thinking and versatile integrated amplifier-DACs around. It has a moving-magnet/moving-coil phono stage, subwoofer outputs, a headphone amp, and a host of other features (see below). The Masters M33 ($4999, all prices USD) is more than just a power amp based on Purifi’s 1ET400A modules. It turned on silently, made almost no noise, provided more than enough power while generating hardly any heat, and passed music through so transparently, at volume levels from low to high, that it left me in near disbelief that so small a box could accomplish so much.” ![]() Doug was enthusiastic: “I was bowled over by the Purifi Eigentakt’s sound and operation. This comprised two 1ET400A modules, a Purifi-designed gain board, and a Hypex power supply, all housed in a DIY-style case. Later, after it had become a commercial enterprise, Purifi sent Doug an “engineering evaluation” version of the first Eigentakt amp. Purifi Audio, founded in Denmark by entrepreneur Peter Lyngdorf and electronics designers Bruno Putzeys and Lars Risbo, was at first devoted to pure research. This consists of Purifi Audio’s 1ET400A monaural, class-D power-amplifier technology, about which SoundStage! Network founder and publisher Doug Schneider wrote in June. NAD’s Masters M33 integrated amplifier-DAC, announced last January in Las Vegas at the 2020 Consumer Electronics Show, is the first commercially available product to implement NAD’s Hybrid Digital Purifi Eigentakt technology. 2018-2019 EISA Awards Video Introduction. ![]()
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