Robert Harley

Snell Type B loudspeaker
Floor Loudspeaker Reviews
Robert Harley, Larry Greenhill  |  Oct 14, 2022  |  First Published: Dec 01, 1991
The Snell Type B is the culmination of three years' research and development effort by designer Kevin Voecks. Along the way, various iterations of the B have been shown at Consumer Electronics Shows. Like other Snell models, the facilities of Canada's National Research Council were used extensively during the B's development, both their anechoic chamber and their double-blind listening techniques.
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Monitor Audio Studio 20 loudspeaker
Floor Loudspeaker Reviews
Robert Harley  |  Jul 14, 2022  |  First Published: Dec 01, 1991
A review of the Monitor Audio Studio 20 loudspeaker is a study in contrasts. Compared with most other loudspeakers in the $4500/pair range, this 6.5" two-way from England is a mere pup. Perhaps this observation was sparked by the fact that I'd just finished reviewing the similarly priced Snell Type B, a huge, six-driver, four-way system. The two loudspeakers couldn't be more different, both in physical characteristics and sound.
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Sonic Frontiers Anthem Integrated 1 integrated amplifier
Integrated Amp Reviews
Robert Harley  |  Oct 15, 2021  |  First Published: Dec 01, 1996
When the person on the street hears the term "high-end audio," they usually think of fancy, feature-laden systems that cost more than most houses. The unfortunate phrase evokes images of a lavish lifestyle replete with expansive Manhattan apartments and rolling country estates.
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California Audio Labs Sigma D/A processor
Budget Component ReviewsDigital Processor Reviews
Robert Harley  |  Dec 09, 2020  |  First Published: Oct 01, 1992
Though their first CD player featured a vacuum-tube output stage, California Audio Labs is recently known for making good-sounding, moderately priced solid-state CD players, like the Icon Mk.II that Jack English reviewed in July 1992 (Vol.15 No.7). The Sigma, a $695 tubed D/A converter, furthers their reputation in both areas.
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Spectral SDR-2000 Professional D/A processor
Digital Processor Reviews
Robert Harley  |  Jul 03, 2020  |  First Published: May 01, 1995
Spectral is a bit of an enigma in the high-end audio world. Although nearly 20 years old and one of the founders of the American high-end audio industry, Spectral isn't a name that comes quickly to mind when considering the best of the best in high-end.

Spectral's low profile is of their own choosing. They advertise very little, their products are demonstrated in a small number of stores, they almost never send products to magazines for review, and they are very quiet about their accomplishments.

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Vortex Screen loudspeaker
Floor Loudspeaker Reviews
Robert Harley  |  May 07, 2020  |  First Published: Jul 01, 1989
One of the joys of reviewing audio reproduction equipment is discovering a little-known product that provides an extraordinary level of performance and musical satisfaction at an affordable price. These components, sometimes made in a garage, reflect the designer's single-minded zeal for musical accuracy, not the sometime corporate mentality of meeting a price point or catering to the latest fad.
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Audio Research VT-150 monoblock power amplifier
Tube Power Amp Reviews
Robert Harley  |  Jan 10, 2020  |  First Published: Aug 01, 1994
At the 1992 Winter Consumer Electronics Show in Las Vegas, Audio Research showed a line of reference products that represented the pinnacle of founder William Z. Johnson's life work as an amplifier designer. Although the all-tubed, fully balanced preamplifier and tubed monoblock power amplifiers were shown as works-in-progress, it was clear that these were products aimed at advancing the state of the amplifier art with no consideration for cost.
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Audio Research LS5 preamplifier & BL2 input controller
Tube Preamp Reviews
Robert Harley  |  Jan 09, 2020  |  First Published: Aug 01, 1994
From the front, the LS5 looks identical to Audio Research's popular LS2: two knobs on either side of the Audio Research nameplate, and a row of toggle switches along the bottom. But that's where the similarities end; the LS5 is a completely different animal from the LS2, or even the balanced LS2B.
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Sumo Axiom CD transport & Theorem II D/A processor
CD Player/Transport ReviewsDigital Processor Reviews
Robert Harley  |  Dec 13, 2019  |  First Published: Jun 01, 1995
Making digital audio sound good appears to be a much more difficult job than its developers first realized. When digital audio was in its infancy, there was a tendency to think that digital either worked perfectly, or didn't work at all. This belief led the engineering community to devise ill-considered and flawed standards that affect the musical quality of digitally reproduced music today.
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PS Audio Digital Link II D/A processor
Digital Processor Reviews
Robert Harley  |  Nov 08, 2019  |  First Published: Oct 01, 1992
Looking at the Digital Link II's build quality and circuitry, it's hard to believe that it can sell for $499 at retail. The Digital Link II shares the same appearance as PS Audio's SuperLink and UltraLink processors, but has a 4"-shorter chassis. The ¼"-thick front panel uses PS Audio's familiar touch-sensitive switches that turn the unit on and select between coaxial and optical inputs. LEDs above these switches indicate when the unit is locked to the digital source. A third LED illuminates when power is applied.
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