NAD, Zetex Collaborate on High-Performance Digital Audio Amp Development
NAD Electronics and Zetex Semiconductors announced their joint development of high-performance digital amplifiers that incorporate Zetex’s Class Z direct digital feedback amplifier (DDFA) technology.
NAD, which has a long history in high-end analog audio, is obviously picky about digital audio. “The [digital] audio performance must match or exceed that of the best linear amplifiers to be considered,” the company stated. “The only solution to pass this test is the Zetex DDFA technology.”
“The high efficiency of Class D is well known and advantageous, but this alone does not qualify it for inclusion in a NAD product,” said Greg Stidsen, NAD’s director of product development. “With the Zetex technology, we get the efficiency but, more important, we also get the no-compromise audio performance our customers expect.”
“Zetex is proud to partner [with] NAD in such an ambitious development,” said Dr. Franz Riedlberger, Zetex’s chief technology officer. “Combining the technologies of Zetex and NAD will deliver an outstanding and highly specified product. All the previous drawbacks of digital amplifiers are simply removed by use of digital feedback; power supply noise and output stage distortion are rejected, and output impedance is very low. The result is the lowest available distortion and noise coupled with outstanding linearity, leading to a detailed and natural sound.”
As a digital amplifier, Zetex’s DDFA performs the whole amplifier process in the digital domain, eliminating digital-to-analog conversions and implementing control functions in the digital domain.
Zetex, said NAD, is “already well-known in audio circles for low-noise bipolar transistors.”
NAD is a member of The Lenbrook Group of Companies.