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John Atkinson Posted: May 30, 1996 0 comments
I first met Tony Federici at a 1986 high-end show in Lucerne, Switzerland. He was at that time distributing Perreaux amplifiers in the US; the dem room Perreaux shared with KEF and McIntosh overlooked Lake Lucerne and Wagner's villa at Tribschen, perhaps the most idyllic setting for Show sound I have ever experienced. Tony was educated as a philosopher: In the 10 years I've known him, I have never known him at a loss for an opinion. It's all the more strange, therefore, that Stereophile has never asked him to submit to the ordeal of a formal interview.
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Shannon Dickson Posted: Apr 27, 1996 0 comments
Siegfried Linkwitz was born in Germany in 1935. He received his electrical engineering degree from Darmstadt Technical University prior to moving to California in 1961 to work for Hewlett-Packard. During his early years in the USA, he did postgraduate work at Stanford University. For over 30 years Mr. Linkwitz has developed electronic test equipment ranging from signal generators, to network and spectrum analyzers, to microwave sweepers and instrumentation for evaluating electromagnetic compatibility.
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Wes Phillips Posted: Apr 09, 1996 0 comments
To get some background information both on Aerial Acoustics and on the 10T loudspeaker that I review this month, I gave Aerial's Michael Kelly a call. When had he got involved in loudspeakers, I asked...
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Jonathan Scull Posted: Sep 14, 2012 Published: Mar 14, 1996 10 comments
Jonathan Scull: How long have you been making cables, Ulrik?

Ulrik Poulsen: It's actually close to three years now...It's a spinoff from other products we make. Actually, Alpha-Core manufactures magnetic cores and various materials and components for transformers...And we have a daughter company called Tortran that manufactures toroidal transformers. Anyway, five years ago we introduced a new product called Laminax. It's a combination of copper and aluminum with various kinds of dielectrics. This is laminated together continuously in various fashions to produce a material that's used as shielding for EMI and RFI in the electronics industry.

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Wes Phillips Posted: Mar 03, 1996 0 comments
Kevin Hayes: Valve Amplification Company arose out of my dissatisfaction with the stereo gear I could buy. I've been an audiophile since before I knew what the word meant, going back to the mid-'70s. I had an epiphany when I first heard a piece of old tubed gear, a Fisher X101, that simply blew away a highly touted receiver that I happened to own. It was a 25W integrated amplifier, using 7591s on the output, and except for sustained organ-pedal notes, it was far better than what I had at that time.
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Jonathan Scull Posted: Apr 04, 2004 Published: Jan 01, 1996 0 comments
Jonathan Scull: Gordon, please tell us what you see as the basic difference between single-ended and push-pull.
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Robert Deutsch Posted: Dec 02, 1995 0 comments
Victor Khomenko, the "VK" of Balanced Audio Technology's VK-5 preamp and VK-60 amplifier, was born in St. Petersburg (then Leningrad), and grew up two blocks from the Svetlana tube factory. He attended the prestigious Leningrad Polytechnic Institute and received an M.S. in physics and electronics, specializing in electronic emissions. He spent his early working life in the Russian electronics industry, then emigrated to the US in 1979—with $400, a family, no home, and no job.
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Wes Phillips Posted: Nov 23, 1995 0 comments
Wes Phillips: How did you come to design the WATT—and the Puppy?
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Jonathan Scull Posted: Sep 05, 2013 Published: Nov 01, 1995 51 comments
Ted Denney at the 2003 CES. (Photo: John Atkinson)

As I had been impressed with Ted Denney's Synergistic Research cable, I thought that asking him for 25,000 words on his thoughts on cable design and performance would be an appropriate accompaniment to my Symphonic Line Kraft 400 amplifier review.

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Jonathan Scull Posted: Aug 16, 2013 Published: Nov 01, 1995 1 comments
I'm not sure why, but people tell me things. Maybe it's because they realize I listen. They reveal themselves, sometimes in charming and unexpected ways. So I was almost prepared for my three-way conference call with the designer of the Symphonic Line Kraft 400 power amplifier, Rolf Gemein, in Germany and Indianapolis-based importer/distributor Klaus Bunge. I started by asking Rolf about his design philosophy . . .
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Robert Harley Posted: Sep 26, 1995 0 comments
Cary Audio Design founder Dennis Had is largely responsible for popularizing single-ended amplifiers in America. Since appearing on the scene in 1989, Cary Audio Design has forged its own niche in the high-end audio industry. I spoke with Dennis Had about how he got started building amplifiers, and why he's so committed to single-ended triode designs.
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Thomas J. Norton Posted: Jul 16, 2015 Published: Jan 01, 1995 1 comments
95christie.250.jpgWhen Cary Christie, Arnie Nudell, and John Ulrick founded Infinity Systems more than 25 years ago, high-end audio as we know it today didn't exist. Hi-fi was audio, though the reverse wasn't necessarily true.

Through the growth years, Infinity became a major force in the High End. Cary Christie is the only one of the original players still associated with Infinity in 1995, now part of Harman International. His relationship, however, is now as an independent designer and consultant with Christie Designs, Inc. (footnote 1). I corralled him by phone on a clear fall day in Santa Fe, and a snowy one at his home near Lake Tahoe, Nevada. I asked him how Infinity had started.

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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.

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John Atkinson Posted: Jun 09, 2015 Published: Jan 01, 1995 2 comments
It was with regret that I heard John Ulrick had passed away on May 20, 2015 due to complications from cancer. With Arnie Nudell and Cary Christie, John was one of the founders of loudspeaker manufacturer Infinity, a company that, with Audio Research, Magnepan, Mark Levinson, and Threshold, epitomized the nascent High End that emerged in the early 1970s. After leaving Infinity, John Ulrick started Spectron, to manufacture class-D amplifiers.

Just by chance, I met with the John Ulrick, in Los Angeles in late 1987, when he was doing some design consultancy on a switch-mode power amplifier to be used with the Sumo Samson subwoofer. As I had my Walkman Pro with me, I took the opportunity to tape some background from John about the birth of Infinity and about switching/pulse-width-modulated/class-D amplifiers—boy, can this man talk about switching amplifiers! The natural kickoff question was, How did Infinity get going?

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John Atkinson Posted: Oct 25, 1994 0 comments
More than 20 years ago, when the turntable was considered a perfectly neutral component in the playback chain, Ivor Tiefenbrun single-handedly demonstrated to the world that the turntable was not only an important part of a hi-fi system, but perhaps the most important part. That radical idea was the basis for the legendary Linn Sondek LP12 turntable, the product that launched Linn, and which is still in production 22 years later.


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