John Atkinson

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John Atkinson Posted: Jun 30, 1995 Published: Jun 30, 1992 0 comments
One of the great imponderables in hi-fi is how much the vibrations of a dynamic loudspeaker's cabinet walls contribute to its overall sound quality. Studies by William Stevens in the mid-1970s showed that, with some speakers, the acoustic output of the enclosure could be almost as much as that from the drive-units. Since then, responsible speaker designers have worked hard either to damp cabinet vibrations or to shift them to higher frequencies where their effect on the music will be less deleterious.
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John Atkinson Posted: Apr 21, 2013 1 comments
Robert Baird mentioned the seminar program presented at the New York Audio Show by The Sound Organisation. I applaud the Chester Group for featuring educational sessions like these at the Show. At the session I attended, renowned recording engineer Jim Anderson (above), past president of the Audio Engineering Society and Chair of the Clive Davis Department of Recorded Music at New York University's Tisch School for the Arts, compared the original and revised versions of Patricia Barber's Cafe Blue, as well as playing tracks from her new album Smash, which he mixed at Skywalker Sound. The system featured a pair of active MB2S-A monitors from English company PMC, with their distinctive dome midrange units, fed audio from a PrismSound Orpheus DAC and a MacBook Pro.
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John Atkinson Posted: Apr 21, 2011 0 comments
Michael Fremer raved, raved about the Soundsmith SG-200 strain-gauge phono cartridge system in the March issue. "The SG-200 is a unique game-changing product," he wrote, so I made sure I checked it out at Axpona. In a system featuring Soundsmith's own HE150 MOSFETamplifiers and Dragonfly two-way standmounts ($1500/pair), the strain-gauge cartridge, mounted in a Schröder Reference tonearm on a VPI turntable, breathed new life into Dave Brubeck's "Take Five," with a clean, open sound and excellent upper-bass clarity. When Mikey write that the SG-200 was "as addicting as its proponents say," my experience at Axpona convinced me he was correct.
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John Atkinson Posted: Nov 13, 2009 0 comments
"Check it out." Music editor Robert Baird handed me a CD. "He's 70 years old, it's his 13th album, he got Don Was to produce it, and it's his best yet."
John Atkinson Robert Harley Posted: Feb 28, 1990 0 comments
The end of two audiophiles' friendship:
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John Atkinson Posted: Jan 16, 2014 0 comments
Scottish manufacturer Tannoy was showing the Carbon Black version of the Kingdom Royal speaker ($85,000/pair), which adds carbon-fiber trim panels, individually machined metal components, and a “specially formulated” paint on the cabinet surfaces. The speaker combines a 12” Dual-Concentric driver with a supertweeter and a 15”, vented woofer with a corrugated surround for maximum linearity. The Kingdom Royal looked elegant indeed, and driven by Cary single-ended power amplifiers with Cary’s new streamer as source, the full-range, wide-dynamic-range sound was equally elegant.
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John Atkinson Posted: Jan 16, 2014 1 comments
The Polar Vortex weather and its associated flight cancellations prevented Convergent Audio Technology’s Ken Stevens from reaching Las Vegas until the third day of the show. However, once he arrived, he set up a system featuring Vandersteen 5A Carbon speakers, connected by Stealth cables to his new JL5 Triode "Baby CAT" stereo power amplifier. This 100Wpc (8 ohms) amplifier costs $12,000 with amorphous core transformers and Black Gate capacitors, $10,000 with silicon-steel transformers. The circuit features what Ken calls "OptiBias"—Ken describes this as "somewhere between constant current and constant power"—which keeps the bias current of the output-stage KT120 tubes independent of fluctuations in the AC supply voltage. Those who feel tube amplifiers can’t rock hard in the bass should have experienced the Led Zeppelin track I auditioned in Ken’s room.
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John Atkinson Posted: Jul 22, 2007 0 comments
Back in the bad old pioneer days of high fidelity, the 1960s and early 1970s, amplifier manufacturers embarked on a specifications war, claiming ever lower percentages of total harmonic distortion. But, as J. Gordon Holt presciently pointed out in the 1960s, without reference to the spectrum of the distortion harmonics, the actual percentage was not in itself a reliable indicator of an amplifier's sound quality. And as those early low-THD models had distortion spectra that were heavily biased toward the sonically objectionable fifth, seventh, and ninth harmonics, and suffered from other related ills, they tended to sound quite nasty.
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John Atkinson Posted: Oct 20, 2011 0 comments
The analog front end in the E.A.R. USA room was the Townshend Rock 7 turntable ($3200), with its unique system for applying damping where it is most needed, at the cartridge end of the arm rather than the pivot, fitted with the Helios Omega arm ($2800) and a Dynavector XV1S cartridge. Phono preamp was the E.A.R. 324 that both Art Dudley and Mikey Fremer have enthused over in the pages of Stereophile.
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John Atkinson Posted: Apr 18, 2012 3 comments
As well as providing the sound for the seminar room, which was where a recorded music concert, titled "Euphoria at the Waldorf," was presented Friday and Saturday evenings, The Tweak Studio's exhibit room also featured components from the premium German manufacturer Burmester: a pair of 380 Mk.2 speakers driven by a 911 power amplifier and an 088 preamp. Source was a Walker turntable and arm fitted with a Soundsmith Sussuro Hyperion cartridge. There was much to admire in this system's reproduction of Louis Armstrong singing "St. James Infirmary," but as was the case with so many of the rooms at the Waldorf, the presentation was marred by over-ripe room acoustics.

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