NAD | PURIFY
NAD LICENCES
PURIFI TECH
Canadian electronics manufacturer NAD will be using Danish com-
pany Purifi’s new Eigentakt Class-D amplifier modules to create a
‘next-generation’ amplifier platform for NAD. Although Purifi is a new
company (established 2017), its founders, Bruno Putzeys (Philips,
Hypex, Kii Audio), Lars Risbo (Toccata Technology, Texas Instru-
ments), and Peter Lyngdorf (Hi-Fi Klubben, TacT, Dali, NAD, Snell,
AudioNord, Steinway-Lyngdorf) are all household names in the audio
industry.
Purifi’s first product, the 1ET400A, 400-watt Class-D amplifier
module, was shown for the first time at the recently-concluded High
End 2019, in Munich. The technology is said to be impervious to fre-
quency, level and impedance variations, and to deliver lower levels of
THD and IMD than any other amplifier available. The company claims
‘extraordinarily low noise’ (~11.5μV A-weighted), THD+N of less than
0.00017%, an output current capability of 25-amps, and dynamic
range of 131dB. It also claims 94 per cent efficiency for the module
when it’s delivering 400-watts into 4Ω.
Putzeys, who holds patents for Hypex’s much-vaunted NCore
and UcD technologies, created a new Class-D technology for Purifi
known as Eigentakt (‘self-clocking’), which he says was the result of
his research into the self-oscillation behaviours in Class-D amplifiers.
Putzeys claims that the circuit, using new algorithms in control loops,
improves on all existing Class-D designs by an order of magnitude or
more and it’s this technology that NAD will adapt to suit its signature
design requirements. ‘The Eigentakt technology is unique,’ said Putzeys.
‘Amplifiers using this technology will be indifferent to speaker load, volume
level, and signal content, resulting in negligible THD and IMD levels, and
will feature exceptionally clean clipping while at the same time delivering a
frequency response in the audio band that is within ±0.01dB under all load
conditions.’
Gordon Simmonds, CEO of the Canada-based Lenbrook Group,
which owns NAD Electronics, Bluesound and PSB Loudspeakers, told
Australian Hi-Fi Magazine that the design team at NAD, led by Greg
Stidsen and Taresh Vadgama, had been working with Putzeys,
Risbo and Lyngdorf for many years. ‘Clearly, we all share the same
commitment to audio excellence so NAD is pleased and proud to be at the
forefront of adopting Purifi’s class-leading technology,’ he said. ‘Our teams
are already fully engaged in the process of developing a next-generation
amplifier platform that will feature this circuitry, keeping NAD and our
other brands at the forefront of audio technology as it begins to weave into
our product roadmap.’
‘I have personally been involved with NAD Electronics and have known
the Lenbrook team for 40 years,’ said Lyngdorf. ‘NAD is the perfect col-
laboration partner for this new technology and we look forward to their
implementation, as we are sure it will propel the industry’s expectations for
high-fidelityamplifiers.’
For more information, contact NAD’s Australian distributor,
Convoy International on (02) 9774 9900 or visit the website
at http://www.convoy.com.au
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