Interviews

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Interviews
Loudspeaker designer John Dunlavy: By the Numbers...
John Atkinson  |  Aug 24, 1996
One of the characteristic traits, I have found, that defines the loudspeaker designer is that they are loners—they seem to avoid one another's company as if on purpose. But if ever you sit down with a designer, all you need to do to open him up is to ask him what he feels to be important in loudspeaker performance.
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Interviews
VTL's Luke Manley
Jonathan Scull  |  May 24, 2013  |  First Published: Jun 01, 1996
Luke Manley at Manhattan's Innovative Audio (Photo: John Atkinson)

Jonathan Scull: How long has VTL been in business, Luke?

Luke Manley: My dad, David Manley, and I co-founded VTL in June of 1986. We started small on the East Coast, and soon after we moved to California.

Scull: Is it because you're really a West Coast kind of guy?

Manley: [laughs] You bet! There's a lot of supporting industries out there; a big base of electronics manufacturers, for example.

Scull: What, in the San Francisco area?

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Interviews
Tony Federici: Accurate in the USA
John Atkinson  |  May 30, 1996
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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Interviews
Siegfried Linkwitz
Shannon Dickson  |  Apr 27, 1996
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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Interviews
Home-Grown: Michael Kelly of Aerial Acoustics
Wes Phillips  |  Apr 09, 1996
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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Interviews
Ulrik Poulsen and his Amazing Alpha-Core Cables
Jonathan Scull  |  Sep 14, 2012  |  First Published: Mar 14, 1996
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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Interviews
Kevin Hayes: Knowledge from the Glass Age
Wes Phillips  |  Mar 03, 1996
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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Interviews
Gordon Rankin, Wavelength's Single-Ended Man
Jonathan Scull  |  Apr 04, 2004  |  First Published: Jan 01, 1996
Jonathan Scull: Gordon, please tell us what you see as the basic difference between single-ended and push-pull.
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Interviews
BATmen: Victor Khomenko & Steve Bednarski
Robert Deutsch  |  Dec 02, 1995
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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Interviews
David Wilson: Speaking the Same Language
Wes Phillips  |  Nov 23, 1995
Wes Phillips: How did you come to design the WATT—and the Puppy?
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Interviews
Rolf Gemein: the Heart of the Matter
Jonathan Scull  |  Aug 16, 2013  |  First Published: Nov 01, 1995
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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Interviews
Ted Denney's Excellent Adventure
Jonathan Scull  |  Sep 05, 2013  |  First Published: Nov 01, 1995
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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Interviews
The Single-Ended Amplifier: Cary's Dennis Had
Robert Harley  |  Sep 26, 1995
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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FeaturesInterviewsReference
HDCD: Keith Johnson, Pflash Pflaumer, Michael Ritter
Robert Harley  |  Jul 10, 2018  |  First Published: May 01, 1995
The men behind HDCD (L–R: Pflash Pflaumer, Michael Ritter, Keith Johnson

High Definition Compatible Digital® (HDCD®), the proprietary process for improving the sound of 16-bit digital audio, has finally arrived. More than a dozen digital processors using the technology are on the market, and the professional encoder used to master HDCD discs is following closely behind.

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Interviews
John Ulrick
John Atkinson  |  Jun 09, 2015  |  First Published: Jan 01, 1995
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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