Robert Deutsch

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Robert Deutsch Posted: May 25, 2003 0 comments
Ah, Brazil...land of coffee, the samba, Pelé, Rio-by-the-sea-o, and tube amplifiers. All right, so perhaps the amplifier connection isn't quite as well-established. But one Brazilian amplifier designer, Eduardo de Lima, has published articles in Glass Audio magazine that are viewed by many as groundbreaking, and his evolving products have been seen at various specialist tube equipment shows. De Lima—president, founder, product designer, and principal owner of Audiopax Sistemas Eletroacusticos—is an electrical engineer who started out designing equipment for a telecommunications company, but since 1995 he's devoted his talents to designing a wide range of audio products, including speakers as well as preamps and power amps.
Robert Deutsch Posted: Oct 20, 2002 0 comments
Single-ended triode amplifiers (SETs) have a considerable following, but even their most devoted fans admit that its maximum power output is not among an SET's strengths. You'd be lucky to get an SET that puts out 7Wpc, and some (like those using the 45 tube) are closer to 2Wpc. Highly sensitive speakers (eg, horns) will tend to offset the power limitation, and SETs usually sound more powerful than their measurements indicate, but the laws of physics still apply: 2W is 2W, regardless of the kind of amplifier that produces it, and an amplifier's manner of clipping and recovery from overload take us only part of the way toward achieving greater volume.
Robert Deutsch Posted: May 19, 2002 0 comments
Single-ended triode (SET) amplifiers are typically paired with horn loudspeakers, for good reason: most SETs produce very low power, so to get acceptable loudness you need a highly sensitive speaker, which means horns. Similarly, horn owners are often advised that the best amplifier for their speakers is a SET. Certainly, the horn-SET combination can be magical, but, in my experience, SETs are not the only type of amplifier that can sound good with horns.
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Robert Deutsch Posted: Mar 24, 2002 0 comments
Is it the low exhibitor rates? The excuse to visit Montreal, perhaps North America's most cosmopolitan city? The efficiency and charm of organizer Marie-Christine Prin and her assistants? Whatever the reason(s), Montreal's Festival Son & Image has become a real success story, attracting an ever-increasing array of exhibitors and audiophiles from far and wide. Last year, the Festival spilled over from the downtown Delta Hotel to the Four Points Sheraton across the street; this year, there were exhibits in the Holiday Inn next door as well.
Robert Deutsch Posted: Dec 02, 2001 0 comments
PS Audio's Power Plant AC-regeneration devices have taken the audio and home-theater worlds by storm. The P300 was voted 2000 Accessory of the Year in Stereophile (December 2000), and the P600 won the Editors' Choice Platinum Award in Stereophile Guide to Home Theater (January 2001). The Power Plant differs from conventional power-line conditioners (PLCs) in that it doesn't just "clean up" AC but actually synthesizes (or regenerates) it. Each Power Plant is essentially a special-purpose amplifier, producing AC to run the equipment plugged into it, the maximum output wattage indicated by the model number. (The most powerful Power Plant available is the P1200, which produces 1200W.)
Robert Deutsch Posted: Jul 05, 2001 0 comments
Few topics will get audiophiles into an argument more readily than a discussion of the relative merits of tubed and solid-state equipment. A poll on the Stereophile website showed 53% of respondents choosing solid-state as their preferred amplifier design, while 38% indicated a preference for tubes—the remainder choosing "other," which presumably means digital amplifiers. (There has been no corresponding survey regarding preamplifier designs.) Opinions tend toward the dogmatic, with one respondent declaring "solid-state is more accurate," another stating unequivocally that "tubes sound closer to the real thing."
Robert Deutsch Posted: May 20, 2001 0 comments
"I'm a fan of tubes—I don't like designing with them, but I do like listening to them."—Paul McGowan, Stereophile interview, May 2000
Robert Deutsch Posted: Jan 25, 2001 1 comments
At the Consumer Electronics show in Las Vegas in January 1999, Mark Schifter, erstwhile president of Audio Alchemy, was handing out a press release announcing what seemed like a groundbreaking product from his new company, Perpetual Technologies. The product was the P-1A, a digital-to-digital processor that would do resolution enhancement, loudspeaker correction (amplitude and phase), and room correction—all for less than $1k. It sounded too good to be true.
Robert Deutsch Posted: Sep 12, 2000 0 comments
You've probably seen the ad in Stereophile: a very personal account by Avantgarde-USA president Jim Smith, describing how, during a 30-year career in high-end audio, he had become increasingly disappointed with conventional loudspeakers' ability to communicate the emotional impact of live music, and how he found the answer with the Avantgarde horn loudspeakers. It's advertising copy in the best I-liked-it-so-much-I-bought-the-company tradition—with the exception that Smith did not actually buy Avantgarde Acoustic, but did become their North American distributor.
Robert Deutsch Posted: Jun 30, 2000 0 comments
It may come as a surprise to relative newcomers to the field of audio, but some loudspeaker manufacturers are manufacturers in only a limited sense. They buy drivers, off-the-shelf or custom-built, from companies like VIFA, SEAS, Focal, etc.; cabinets from a woodworking shop; and crossovers from an electronics subcontractor. While the system design will have taken place in-house, actual manufacturing is restricted to assembling the components, perhaps tweaking the crossover, and final QC. Even some highly successful loudspeaker manufacturers use this approach, which can work well as long as the suppliers do their jobs properly.

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