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Robert Harley Posted: Aug 24, 2015 Published: Jan 01, 1995 0 comments
Arnie Nudell is one of a handful of designers who could justifiably be called founding members of the high-end audio industry. With Cary Christie, and John Ulrick, Arnie co-founded Infinity in his garage in 1968 and recently joined forces with Paul McGowan, the co-founder of PS Audio, to create Genesis Technologies, the Colorado-based company formed to build ultra–high-end loudspeaker systems.

I visited the Genesis factory in September 1994 and spent some time with Arnie and Paul discussing loudspeaker and amplifier design, and high-quality music reproduction. I asked Arnie how he became involved in high-end audio.

Robert Harley Posted: May 07, 2015 Published: Jun 01, 1991 0 comments
666wawaWadia2000.1250.jpgDuring my reviews of digital processors in the past year or so, I've made comparisons with the Wadia 2000 Digital Decoding Computer first reviewed by Arnis Balgalvis in Vol.13 No.1. I've felt that, as good as the 2000 is, other processors—many costing less than the 2000's $8500 price tag—are now superior.

However, a visiting Wadia representative looked inside our sample and used the word "ancient" to describe its circuitry in relation to current production. In addition, I was never able to audition the 2000 with a glass fiber-optical interface, standard equipment on Wadia's transports. Similarly, the $2000 Wadia X-32 had undergone a minor circuit revision, including the inclusion of the glass optical input. Consequently, a follow-up of these two excellent processors seemed in order.

Robert Harley Posted: May 06, 2015 Published: Nov 01, 1991 0 comments
In hindsight, it was inevitable that two sophisticated digital audio technologies—software-based digital filters and Bitstream D/A converters—were destined to be married in one product. The software-based D/A converters offered by Krell, Wadia, and Theta all used multi-bit ladder DACs, and Bitstream-based units have previously relied on off-the-shelf digital filters.
Robert Harley Posted: Apr 17, 2015 Published: Nov 01, 1991 3 comments
"In the fields of observation, chance favors only the mind that is prepared."

When Louis Pasteur uttered these words more than a hundred years ago, he must have speculated that they would apply equally well to future circumstances as to the events of his day. What he couldn't anticipate, however, was the technology to which his insight now seems so appropriate.

Robert Harley Sam Tellig Posted: Jun 18, 2014 Published: Aug 01, 1991 0 comments
No, the $399 price listed in the specification block isn't a misprint. And yes, the Audio Alchemy Digital Decoding Engine v1.0 is indeed a full-function outboard digital processor. And since this is the August issue, not April, you can stop worrying that this review is some kind of joke.

The $399 Digital Decoding Engine is for real.

Robert Harley Posted: Feb 13, 2014 Published: Mar 01, 1992 1 comments
Since the first digital processor on the market using UltraAnalog DACs appeared (the $12,000 Stax DAC-X1t, reviewed in August 1990, Vol.13 No.8), there has been a proliferation of good-sounding processors using this extraordinary—and expensive—part. Among these are the Audio Research DAC1, Audio Research DAC1-20, VTL Reference D/A, and the groundbreaking Mark Levinson No.30 reviewed last month.
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Peter W. Mitchell Robert Harley Posted: Dec 10, 2013 Published: Dec 01, 1991 13 comments
Editor's Introduction: In 2013, lossy compression is everywhere—without lossy codecs like MP3, Dolby Digital, DTS, A2DP, AAC, apt-X, and Ogg Vorbis, there would be no Web audio services like Spotify or Pandora, no multichannel soundtracks on DVD, no Bluetooth audio, no DAB and HDradio, no Sirius/XM, and no iTunes, to quote the commercial successes and no Napster, MiniDisc, or DCC, to quote the failures. Despite their potential for damage to the music, the convenience and sometimes drastic reduction in audio file size have made lossy codecs ubiquitous in the 21st century. Stereophile covered the development of lossy compression; following is an article from more than two decades ago warning of the sonic dangers.—Editor
Robert Harley Posted: May 21, 2013 Published: Aug 01, 1993 0 comments
The loudspeaker designer's art has changed radically over the past 20 years. Although the goals are largely the same, today's designer employs tools and techniques unimaginable two decades ago. Computer modeling, powerful and affordable FFT machines, and sophisticated new driver technologies are just a few of the advantages enjoyed by the modern designer. The high-tech result is a vastly better loudspeaker—even inexpensive products today are significantly better than those of even five years ago, never mind 20.

The new Genesis III loudspeaker shows just how sophisticated the designer's art has become. The Genesis III is as far removed from the cones-in-boxes loudspeakers of yesterday as a Ford Taurus is from a Pinto. Combining a radically different cabinet with unusual custom drive-units, the Genesis III is a paradigm of how high technology has transformed loudspeaker design.

Robert Harley Sam Tellig Posted: Sep 19, 2012 Published: Sep 01, 1995 0 comments
I can't think of two products at further ends of the audio spectrum than a single-ended triode tubed amplifier and a mass-market Home Theater loudspeaker. Single-ended tubed amplifiers are about reproducing subtlety, delicacy, nuance, and communicating the music's inner essence. Conversely, a Home Theater loudspeaker system—particularly one made by a mass-market manufacturer—would appear to put the emphasis on booming bass and reproducing shotgun blasts, with little regard for musical refinement.

What a bizarre marriage it was, then, to pair the new Infinity Composition Prelude P-FR loudspeakers with the Cary Audio Design CAD-300SEI 11W single-ended triode amplifier (reviewed elsewhere in this issue). This combination didn't happen by accident; as you'll see, these apparently disparate products are a match made in heaven.

I discovered the Infinity Preludes while surveying Home Theater loudspeaker systems for the upcoming second issue of the Stereophile Guide to Home Theater. In addition to evaluating the loudspeaker systems under review with video soundtracks, I assessed their musical qualities—or lack thereof. The Preludes were such a musical standout that I rescued them from the Home Theater room (where they had been powered by mass-market receivers and fed with a laserdisc source) and gave them a new lease on life in the larger music room, with reference-quality source and amplification components. The Preludes' extraordinary musical performance and unique design compelled me to tell you about how they performed in an audiophile-quality two-channel playback system.

Robert Harley Posted: Aug 17, 2012 Published: Mar 01, 1996 0 comments
With the introduction of Audio Alchemy's Digital Transmission Interface (DTI) more than three years ago, the company created an entirely new category of hi-fi product: the jitter filter. The original DTI was a good start, but didn't always improve the sound of the better-quality digital front-ends.

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