John Atkinson

Ayre Acoustics QX-8, QX-5, & Codex

Getting ready for the first day's visitors in AXPONA's Ear Gear Expo, Ayre's vice president and CTO, Ariel Brown, was busy setting up the Colorado's company's QX-5 Twenty D/A processor ($8950, right) Codex D/A headphone amplifier ($1795, hidden in center, and the new QX-8 D/A processor ($4450 with S/PDIF inputs, $4950 with asynchronous USB input, $5450 with USB and Roon Ready Ethernet, left).
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Janszen Lotus Electrostatic Headphones

On my way to AXPONA's Master Class Theater to catch Rob Robinson's seminar on current-mode phono preamplifiers, I was buttonholed by David Janszen. The Janszen name is synonymous with electrostatic drive-units—the midrange unit in the legendary Wilson WAMM was based on Janszen technology—and at AXPONA David was demonstrating prototype electrostatic headphones, the Lotus.
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Great Plains Audio & the Altec 604

Check this out, Herb Reichert. Oklahoma City-based Great Plains Audio grew from what was left of the Altec Lansing corporation in 1998. It focuses on manufacturing the classic high-sensitivity drive-units and speaker systems from the legendary company. Located next to the AXPONA Master Class Theater, the Great Plains booth featured their version of the classic coaxial drive-unit that was introduced in 1944 and powered recording studio monitors in the 1950s and '60s.
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The MQA Master Class

I turned up at Mike Jbara's Master Class presentation Friday afternoon, "Achieving Authentic Studio Quality Sound," expecting fireworks. Jbara is the chief executive of MQA and many internet denizens had declared that they would be attending his presentation to oppose what he would be saying. But all was quiet during Jbara's 45-minute talk on what he regards as the benefits of the controversial codec to both the music industry and to audiophiles. Another MQA-related Master Class takes place at AXPONA Saturday April 13 at 12 noon. Moderated by Besflores Nievara Jr., Brand Ambassador for Music Direct, Mike Jbara will join MQA partner NAD's CTO, Greg Stidsen, and other panelists to discuss "The Future of High Resolution Audio." Perhaps the fireworks will be in evidence tomorrow!
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Channel D's Rob Robinson Explains Current-Mode Phono Preamps

AXPONA's Master Class lectures offer a series of seminars on sometimes controversial subjects. To wrap up Friday afternoon's talks, Channel D's Rob Robinson explained why for phono preamplifiers, current-mode amplification, with its zero-ohm input impedance, gets the best signal/noise ratio from moving-coil cartridges, compared with conventional voltage-mode circuits, and even improves tracking performance.
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PS Audio Debuts AN3 Loudspeaker

The late Arnie Nudell, co-founder of Infinity, was very much a mentor to PS Audio's Paul McGowan, and Paul and his team have been working a loudspeaker design that would honor Nudell. AXPONA saw the first public demo of the new speaker, the AN3, which is expected to be available toward the end of the year at a price somewhere in the region of $11,500–$14,500/pair. The AN3 features a servo-corrected 12" aluminum-cone woofer, driven by a 700W amplifier mounted on one of the sides, with a folded ribbon tweeter, a rectangular planar midrange unit sourced from Bohlender-Graebener, and an 8" cone "mid-bass coupler," the last a consistent feature of Nudell's designs for Infinity and Genesis.
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An Integrated Amplifier Shootout: Ayre Acoustics EX-8 vs Cambridge Audio

In our February 2019 issue, when I reviewed a new integrated amplifier from Colorado-based Ayre Acoustics, I concluded that "the EX-8 Integrated Hub is a high-end contender at a competitive price" (footnote 1). In that review I promised a Follow-Up in which I would compare the EX-8 with Cambridge Audio's Edge A integrated amplifier, which Ken Micallef had positively reviewed in our January 2019 issue (footnote 2). While I'd enjoyed my time with the EX-8, I'd found its balance rather on the light side, and that it projected voices somewhat forward on the soundstage.
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