NAD says that its newest ‘Masters Series’ product, the NAD M33 BluOS DAC/amplifier, is the first integrated component to feature ‘Eigentakt’ Class-D amplifier technology from Danish manufacturer Purifi. [Click on images to enlarge.]

Rated with an output of 200-watts per channel, the new Class-D amplifier is said to be ‘ultra-quiet’ as well as powerful. Purifi may be a new manufacturer, but it has some of the best-known names in the audio business on board, including Bruno Putzeys, Lars Risbo, Peter Lyngdorf, Kim Madsen, Soren Poulsen, and Carsten Tinggaard. The ‘eignentakt’ (it means ‘self-clocking’ or ‘self-oscillating’) circuit is a hybrid circuit that Putzeys takes pains to point out is ‘a fully analogue design with a loop structure that enables better control of the closed loop frequency response so it’s dead flat in the audio band then rolls off in a fully controlled manner with a sensible –3dB point at 60kHz.’

‘In its simplest form, the NAD M33 is an ultra-high-performance streaming amplifier with superb audiophile sound,’ said Steve Burton of Convoy International, which distributes NAD in Australia, ‘or it can be combined with other players in a BluOS ecosystem of wirelessly networked music players throughout the home for an outstanding whole-home audio system. Particularly notable about the M33 is the ultra-low distortion and noise. Its measured performance is remarkable in that it nears the limits of even the most sensitive and sophisticated test equipment available.’

A feature of the M33 is its 178mm colour touchscreen, which makes the amplifier simple and intuitive to operate, particularly its high-res streaming capabilities. Helping with usability are the BluOS app, the supplied remote control and the ability to control the M33 with your voice by using any Amazon Alexa or Google Assistant device.

The NAD M33 also has Dirac Live Room Correction on board which not only adjusts for frequency response, but unlike other room correction systems, also optimises the impulse response. ‘By optimising the speaker/room interface by calibrating for optimum performance, music sounds more natural and lifelike,’ said Burton. ‘The result is substantially improved musical staging, clarity, voice intelligibility, as well as a deeper and tighter bass.

The NAD M33 has six digital inputs and three analogue inputs including MM/MC phono input, as well as HDMI, to supplement its Bluetooth aptX HD, BluOS and Apple Airplay 2 wireless capabilities. The headphone output uses a fully discrete high voltage, low-output impedance headphone amplifier able to drive even planar and high impedance studio headphones. To guard against future developments, the NAD M33 uses Modular Design Construction (MDC) and has two ‘empty’ MDC slots into which can be plugged upgrade modules. ‘Thanks to MDC, all the M33’s major digital circuits can be upgraded and replaced to keep the unit forever young and capable,’ said Greg Stidson, of NAD. ‘This NAD innovation is a unique architecture that keeps pace with the fast-changing world of technology. With MDC, the ability to easily upgrade a component to include future digital formats is totally unique and unprecedented.’

For more information, contact Convoy International