PRESS

News & Press Releases

Jan 6th, 2020

NAD Masters M33 BluOS Streaming DAC Amplifier Becomes First Integrated Component to Feature Purifi’s Ultra-Quiet Amplification Technology

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Flagship Model is feature-packed, including BluOS multiroom streaming, Gorilla Glass touchscreen controls, 32-bit DAC, full MQA decoding, and Dirac Room Correction.

CES 2020, Las Vegas, NV January 6, 2020 — NAD Electronics, the highly regarded manufacturer of high-performance audio/video components, unveils another new and unique Masters Series product here. The M33, a BluOS™ enabled DAC/amplifier that can serve as the heart of a reference whole-home system. In its simplest form, the M33 (US$4999/€4999/£3999 MSRP) is an ultra-high-performance streaming amplifier with superb audiophile sound. 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. The M33 will be available in March 2020.

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Dec 23th, 2019

Purifi PTT6.5 Woofer and 1ET400A Amplifier Technology Review

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I enjoy reviewing innovative loudspeakers like the Dutch and Dutch 8c and the Kii THREE. I also spend time on diyAudio’s loudspeaker forums looking at what to build next or modify what I have, essentially looking for the “next big thing.” I noticed Purifi’s woofer getting good reviews on diyAudio and ASR. On Audiophile Style, @DuckToller wrote an article on meeting the folks from Purifi in Munich with @The Computer Audiophile. Reading those really peaked my interest.

HiFiCompass’ review of the PTT6.5 shows the woofer measuring considerably better than its competitors, especially in reduced distortion, both THD and IMD. This puts Purifi’s PTT6.5 woofer into a class on to itself. Now I really wanted to hear this woofer! Before I could track down a pair, I received a note from DuckToller asking if I would be interested in evaluating the woofers in kit form. A short while later I received a demo kit and a stereo IET400A amplifier.

I must say upfront that this technology represents a major audible improvement in mid/bass clarity and low frequency extension. Meaning, I have not heard a 6.5” woofer go this low or sound this clean, at concert level volumes. To my ears, the Purifi PTT6.5 woofer is the “next big thing” in transducer technology. Coupled with Purifi’s 1ET400A amplifier, this is the lowest distortion sound I have heard from any amp/speaker combo of this size in my listening room.

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Nov 14th, 2019

HiFiCompass review of PTT6.5W04

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The famous expression “All roads lead to Rome” in the context of today should read “All roads lead to Denmark”. I will not be mistaken if I say that most home speakers up to the very top class are currently being assembled using speaker drivers with Danish roots. Judge for yourself:

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Oct 23th, 2019

Purifi Audio – A Straight Wire to the Soul of Music

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As audioXpress previously reported, Purifi Audio is a new venture involving several audio industry veterans. The Netherlands Audio Engineering Society (AES) section invited two of the company’s founders, Bruno Putzeys and Lars Risbo, for a technical update on their plans, and they graciously agreed to a presentation on June 13 at the Royal Conservatory of Music in The Hague. Our Technical Editor Jan Didden attended and reports.

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Jul 19th, 2019

6moons.com: Eigentakt Demonstrator Amplifier

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Hello Dolly.

Actually, that’s not what the emailer said. Instead, “you might have picked up some noises about me taking part in a new Danish project called Purifi. We combine work on class D amplifiers and speaker drive units specifically to reduce distortion in both. My partner Lars Risbo and I have achieved a roughly 20dB improvement over current designs in both cases. Sonically the impact is quite startling. We are gearing up to become an OEM supplier of
drive units and amplifiers. A few key customers have already gotten samples to play with. So we decided it’s time to go a bit more public.” That was Bruno Putzeys, inventor of class D uCD/Ncore, collaborator in Grimm Audio, engineer with Kii Audio.

Behind Purifi, there’s the already mentioned Lars Risbo who founded Toccata Technology which was later acquired by Texas Instuments for its PCM-PWM direct-digital technology. Lars holds more than 30 US patent families. There’s Carsten Tinggaard, founder/owner of PointSource Acoustics, previous product manager at Danish Sound Technology and CTO of Tymphany where he was in charge of establishing the Danish R&D facility which worked on Peerless, Vifa and ScanSpeak drivers. There’s Peter Lyngdorf of Hi Fi Klubben, Dali and Steinway Lyngdorf, a group with 1000+ employees and multiple factories in Denmark and China. Peter’s background includes stints at NAD, Snell and TacT Audio. There’s Claus Neesgaard who worked for Texas Instruments, Kim Madsen who also came from there plus developed military power modules for Alcatel’s Ariane 5 Rocket and several Dynatech fighter jets. Finally there’s Søren Poulsen again from TI where he owns definition and architecture development of the world’s highest-power top-performing IC amplifier with 5 US patents. That’s an amazing dream team with fantastic resources….

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Jul 3rd, 2019

Review and Measurements of Purifi 1ET400A Amplifier

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This is a review and detailed measurements of the Purifi 1ET400A Class-D amplifier module. Company was kind enough to send me a complete, assembled kit consisting of two modules, power supply and case, ready to go. They have not disclosed the cost of the unit. Modules will be available to DIY channel in Q4 of 2019.

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Jun 28th, 2019

PURIFI Audio and the Audiophile Style reader’s Q&A with Lars Risbo & Bruno Putzeys

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Audiophile Style has already introduced to you PURIFI Audio in a quick manner last month, when we reported from a sneak listening on their prototype Class D amplifier board and the newly developed long-hub transducer in Munich.

Two of the principal owners of the Danish High End upstart, Lars Risbo and Bruno Putzeys from Belgium, then have agreed to the idea of an Q&A with you, our readers, in respect to all the questions that come along with new products and advancements in Class D amplification and transducer technology. You have left us with a bunch of great & challenging questions, however, Bruno and Lars have delivered answers with grace, passion and fire.

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Jun 6th, 2019

Purifi Audio: A Conversation About Amplifiers and Speakers

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As audioXpress revealed a few weeks ago, a new Danish audio company, founded by Bruno Putzeys, Lars Risbo, and Peter Lyngdorf was recently announced. The name is Purifi Audio, and as you can guess from the founders involved, the venture promises Class D amplifiers with record-breaking performance “unmatched by amplifiers of any operating class.” But the new company will be doing more than amplifiers, since it also revealed a new 6.5″ woofer with “magnitudes lower intermodulation distortion across frequency and SPL.”

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May 8th, 2019

NAD Electronics and PURIFI Announce Cooperation Agreement

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NAD will license PURIFI’s patent-pending amplification technology to create next generation amplifier platform

Munich High End 2019, Munich, Germany, 8 May, 2019 – NAD Electronics, the acclaimed high fidelity audio brand with more than 45 years of leadership in performance amplifier innovation, announced that it will be the first international brand to incorporate and launch PURIFI’s new patent-pending class-D technology into its product family. The amplifier circuit, known as Eigentakt (meaning “self-clocking”), is the result of years of research by PURIFI into the self-oscillation behaviours in class-D amplifiers with algorithms that, when applied in control loops, improve existing designs by an order of magnitude or more. The agreement will see the two companies cooperate to adapt the Eigentakt circuit to NAD’s signature design requirements, with the intent to create a new amplifier platform for future, yet-to-be-announced products from NAD.

“The Eigentakt technology is unique,” explains Bruno Putzeys, Co-Founder at PURIFI Audio. “Amplifiers carrying the technology will be exceedingly indifferent to speaker load, volume level, and signal content, resulting in negligible THD and IMD levels, and will feature exceptionally clean clipping.”

According to measurements by PURIFI, the Eigentakt circuit is expected to outperform any audio amplifier known, regardless of echnology or class, with THD and IMD quoted as below 0.00017% at all frequencies and power levels, and the requency response in the audio band remains within +/- 0.01 dB under all load conditions. In addition to its status as a groundbreaking technology, it also represents one of the first products to be commercialized by PURIFI, which was founded in 2014 by industry veterans and renowned audio experts Putzeys, Lars Risbo, and Peter Lyngdorf.

“Our NAD design team, led by Greg Stidsen, Taresh Vadgama and including the late Bjorn Erik Edvardsen, have maintained a close working relationship with Bruno, Lars, and Peter over the 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,” said
Gordon Simmonds, CEO of the Canada-based Lenbrook Group, owners of NAD Electronics as well as other high-fidelity audio brands, Bluesound wireless multi-room and PSB Speakers. “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, Co-Founder and Chairman of PURIFI. “NAD is the perfect collaboration 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-fidelity amplifiers.”

About PURIFI Audio

Based in Roskilde, Denmark, PURIFI was founded in 2014 by industry veterans Bruno Putzeys, Lars Risbo and Peter Lyngdorf, out of a shared conviction that truly significant improvements in musical experience can only be had by addressing technical fundamentals in electromagnetics, mechanics, and acoustics. With a focus on developing and verifying accurate mathematical models to solve problems in analogue and digital sound reproduction, PURIFI aims to remove all technical limitations in the enjoyment of reproduced music. Their first contribution is a new Class-D amplifier circuit called Eigentakt.

For more information visit www.purifi-audio.com

About NAD Electronics

Founded in 1972 and now sold in over 80 countries, NAD Electronics is renowned for its award-winning line of high-quality components for audio, home theatre and custom installation applications. Since the beginning, NAD’s commitment to four core values – innovation, simplicity, performance, and value – have earned it a cult-like following that catapulted it to becoming a household name amongst audiophiles and music lovers alike. To this day, the brand continues to design and manufacture some of the most acclaimed and affordable hi-fi components that include modern features and technologies meant to appeal to a new generation of audiophiles.

For more information visit www.nadelectronics.com

About Lenbrook International

Lenbrook International, a subsidiary of the Lenbrook Group of Companies, is the owner and manufacturer of award-winning brands for home audio and residential install applications. Its full suite of products from NAD Electronics, PSB Speakers, and Bluesound wireless multi-room players, are distributed in over 80 countries, while its BluOS hi-resistributed audio platform continues to be adopted by some of the world’s leading premium audio brands.

For more information visit www.lenbrook.com

Press Contacts:

Claus Neesgaard
Director, PURIFI ApS
cnn@purifi-audio.com

Peter Hoagland
North America Media Relations, NAD Electronics
peter@hoagland.us

Richard Stevenson
UK Media Relations, NAD Electronics
richard@rspr.co.uk

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May 1st, 2019

Danes to PURIFI Amplifiers And Speakers

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PURIFI, a startup from Denmark, is launching a freshly designed line of loudspeaker drivers and new power amplifier modules at the same time. The first amplifier product is a 400W class D module that uses PURIFI’s Eigentakt control scheme, which delivers a stated THD and IMD below -115dB (0.00017%) at all levels and frequencies. Its negligible output impedance insures that the +/-0.01dB frequency response is guaranteed for all loudspeaker loads. The first loudspeaker product is a 6.5” driver with a +/-10mm linear stroke whose IMD is said to be around 20dB lower than that of comparably specified drivers.
For a new company to attack two such disparate lines of work becomes a bit less unusual when one considers the names behind the venture: Peter Lyngdorf, Bruno Putzeys and Lars Risbo. All three have a proven track record in both amplifiers and loudspeakers.
The three started PURIFI because of a shared conviction that real improvements in musical experience can only be had by addressing the technical fundamentals. “The high end audio industry has historically had trouble coming to grips with basics like distortion, tacitly deciding to ignore the problem instead,” notes Putzeys. “It’s not just electronics,” adds Risbo, “loudspeaker units have some clearly identifiable distortion mechanisms that just sit there waiting to be solved”. Backed by Peter Lyngdorf, the pair have thrown themselves onto a project to take on distortion in amplifiers and loudspeakers alike.
In both cases their approach is highly systematic and mathematical. The philosophy is that while simulations are useful virtual prototyping tools, they do not provide any deeper insight than trying things out in the lab. By contrast, mathematical descriptions of the problem often end up spelling out the solution.
PURIFI’s amplifier modules are industrialized by the team previously responsible for rolling out Texas Instruments’ high power class D amplifier chip range. For the drivers the company has joined forces with Carsten Tinggaard (PointSource Acoustics and formerly Peerless) who for the past two decades has been behind some of the most recognizable drive units in the industry.
To coincide with the High End show in Munich (8-12 May), the company is organizing a demo targeted at high end electronics and loudspeaker manufacturers who are interested in incorporating one of the new technologies.
For inquiries contact PURIFI’s MD, Claus Neesgaard (cnn@purifi-audio.com). For further technical information and a background on the whole team, please check www.purifi-audio.com

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Apr 18th, 2019

Purifi Audio Promises to Reduce Distortion in Speakers and Amplifiers

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A new Danish company, founded by Bruno Putzeys, Lars Risbo, and Peter Lyngdorf will be making its first public presentation to the industry in Munich 9-12 May, concurrently with High End 2019. The name is Purifi Audio, and as you can guess from the founders involved, the venture promises Class D amplifiers with record-breaking performance “unmatched by amplifiers of any operating class.” But the new company will be doing more than amplifiers, since it will also reveal a new 6.5″ woofer with “magnitudes lower intermodulation distortion across frequency and SPL.”

Some of our readers who follow the audio industry closely might have already picked up the rumors about the new Danish project – until now in stealth-mode – which combines work on Class-D amplifiers and loudspeaker drive units specifically intending to reduce distortion in both. Purifi Audio was born out of the research work of Class-D pioneers Bruno Putzeys (of Philips, Hypex and Kii Audio fame) and Lars Risbo (Toccata Technology and Texas Instruments), according to which, the new “Eigentakt” self-clocking amplifier technology achieves a roughly 20dB improvement over previous generations.

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