Robert Deutsch

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Robert Deutsch  |  Aug 02, 2018  |  First Published: Apr 01, 1995  |  1 comments
Founded by Nelson Pass in 1974, Threshold is one of those companies audiophiles tend to take for granted. Best known for the much-imitated Stasis (sliding bias) amplifier designs, Threshold became one of the industry leaders during the early 1980s. Since then, they've been upstaged somewhat by such rivals as Krell and Mark Levinson, and the public's impression of the company's stability wasn't helped by the departure of several of its principals, including Nelson Pass.
Robert Deutsch  |  Jul 05, 2018  |  First Published: May 01, 1995  |  4 comments
When it comes to amplifiers, ya gotcher tubes, yer solid-states, and yer hybrids. Although amplifier manufacturers would have you believe otherwise, the majority of designs within each category are variations on a few fairly-well-known themes. Everyone agrees that the power supply is extremely important. Most designers try to obtain the amplifier's desired frequency response and distortion characteristics with a minimum of negative feedback. It's also agreed—at least among designers of solid-state amps—that the ability to drive a variety of speakers, including those that present a low-impedance and/or reactive load, is an important priority.
Robert Deutsch  |  Jan 30, 2018  |  7 comments
After I'd concluded my critical listening sessions with the PS Audio Stellar M700s that I review elsewhere in this issue, I got a call from Dave Morrison of IsoAcoustics, in Markham, Ontario, makers of the Gaia loudspeaker isolation feet. He told me that they had a new product, the Orea, that applies to audio electronics—preamps, power amps, DACs—the isolation technology used in the Gaia.
Robert Deutsch  |  Jan 23, 2018  |  26 comments
Although PS Audio's Stellar M700 monoblock power amplifier ($2998/pair) is a brand-new design from a team led by engineer Darren Myers, it draws on the company's extensive experience with class-D amplification. Sam Tellig and Kalman Rubinson reviewed PSA's HCA-2 power amp in, respectively, the October and December 2002 issues, and I reviewed their GCC-100 integrated amp in January 2006. The Stellar M700's input stage is the latest version of PS Audio's Gain Cell, which they describe as a "proprietary, fully differential, zero feedback, discrete, class-A MOSFET circuit.
Robert Deutsch  |  Oct 23, 2017  |  6 comments
Having heard some impressive, cost-no-object audiophile systems at TAVES, I returned to the Totem room to listen to the Tribe Tower, and continued to marvel at the power and sheer musicality of this system…
Robert Deutsch  |  Oct 21, 2017  |  4 comments
If you do a Google search for "loudspeaker" combined with "full-range," "line source," "one-way," and "modular," you'll get results that match some, but not all, of the characteristics of the Ruel Audio R7. The Audience ClearAudient 16+16 comes the closest, with 16 drivers firing forward and 16 to the back, but its small full-range drivers are supplemented with eight 6x9" passive radiators, and it does not have modular construction. Plus, it appears not to be in production. For that matter, Google misses Ruel, but it has been granted a provisional patent.
Robert Deutsch  |  Oct 18, 2017  |  7 comments
The Toronto Audio Video Entertainment Show (TAVES) has changed its venue. The show that now bills itself "North America's ULTIMATE Technology & Hi-Fi Show" has moved from the suburban Sheraton/Best Western location of the past two years to the Toronto Congress Centre, near the airport.

Why the move? Suave Kajko, President of TAVES, cites several reasons: the venue wanted to literally double the price for the large rooms; the Best Western hotel was the source of many complaints from exhibitors, and, in any case, is scheduled for demolition, and the show was bursting at the seams in terms of space (they didn't have enough space for booth exhibitors).

Robert Deutsch  |  Sep 26, 2017  |  7 comments
The first time I heard a CD player in my own system was in 1983, the first year of the format's introduction in the West. CD players were generally hard to come by, but I had a friend who worked for Sony, and he came over with his new toy: Sony's next-to-top-of-the-line CD player. (I think it was a CDP-501.) We connected it to my system—at the time, Quad ESLs driven by a Luxman tube amplifier, with a Linn turntable—and listened to some Sony demo CDs.
Robert Deutsch  |  Sep 14, 2017  |  10 comments
IsoAcoustics Inc. has its head office in Ontario and its manufacturing facilities in China, and is headed by Dave Morrison, who for 20 years has been involved in designing radio and television studios for the Canadian Broadcasting Corporation. The IsoAcoustics products are the result of this experience. Although relatively new on the consumer-audio market, IsoAcoustics' speaker-isolation products have gained wide acceptance in pro audio; their client list of recording and mastering studios includes Blackbird (Nashville), Mastering Palace (NYC), Flux (NYC), United Recording (LA), the Boston Symphony Orchestra, Skywalker Ranch, and Abbey Road.
Robert Deutsch  |  Sep 07, 2017  |  First Published: Oct 01, 1992  |  0 comments
One never knows, do one? Within the past year, I've had six preamplifiers in my system for critical evaluation, reviewing four of them and using another two as references. I was getting pretty tired of listening for sonic differences among preamps, and I told JA that I'd prefer my next reviewing assignment to be something different, like a speaker or a power amp. He agreed, but said he'd first like me to review just one more preamp, the Perfectionist Audio CPR/TIPS, which had been waiting patiently in the review queue in Santa Fe. Well, one more wouldn't hurt. Sounded kind of interesting, anyway: a preamp with a battery-operated power supply!

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