September 1997 saw the 35th anniversary of Stereophile magazine, founded by J. Gordon Holt back in 1962. If any interview needs no introduction, this is it. My interview with Gordon was conducted around the kitchen table in Gordon's Boulder, Colorado home over a couple of cold beers. It seemed appropriate to start at the very beginning... J. Gordon Holt: I don't remember when that was.
Although the term "professional" is often used as part of model designations in consumer electronics, the actual overlap between the audiophile consumer market and the real pro market is quite small. There are speakers in common use as studio monitors that no self-respecting audiophile would want to be caught dead listening to, and the typical audiophile loudspeaker would go up in smoke if asked to pump out the kind of volume that pro application routinely demands. To a lesser extent, the same applies to amplifiers: pro is pro and consumer is consumer, and ne'er the twain shall meet.
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.
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.
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.
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...
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.
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.
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.
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 . . .
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.