John Atkinson

John Atkinson  |  Mar 26, 2010  |  2 comments
The Give Band's singer/flute player, Caroline St. Louis, was last seen on this Show report wearing a blue wig at the ticket counter. Wearing a wireless mike, she danced and sang to impressive effect.
John Atkinson  |  Mar 26, 2010  |  0 comments
I was also impressed by the sound of the $7000/pair Joseph Pulsar stand-mount that Stephen Mejias blogged about. What was notable about the set-up was that, in order to tame the hotel room acoustic, Jeff had set-up the speakers, driven by Simaudio's new 175Wpc Moon 700i integrated amplifier via Cardas Clear cables, to fire across the room's diagonal. If you have problems getting an optimal transition between the mid-bass and upper bass in your room, you might want to try this set-up (significant other not objecting, of course).
John Atkinson  |  Mar 26, 2010  |  3 comments
Like Art Dudley below, I started my first day at SSI at the Coup de Foudre room featuring DeVore speakers and Leben amplification. And like Art, I was impressed by the sound, listening to LPs of Skip James and Gil Scott-Heron. (John and Jonathan never play audiophile favorites.) And note the judicious use of the hotel's bed heads, usually hanging on the wall, in front of the window alcove to tame the room acoustics. Good Show sound benefits from the prepared mind—or something.
John Atkinson  |  Mar 15, 2010  |  1 comments
A decade ago, many predicted that amplifiers with switching or class-D output stages would come to dominate high-end audio. In a post–Peak Oil world in which the price of energy would always continue to rise, a class-D amplifier's very high efficiency in converting AC from the wall outlet into speaker-driving power would be a killer benefit. Although a conventional push-pull class-B amplifier has a theoretical efficiency of 78.5%, which would seem usefully high, this efficiency is obtained only at the onset of clipping; the need for the output devices to carry a standing bias current reduces that efficiency considerably, typically to around 50%. Class-A amplifiers are even less efficient, with a maximum of 25%; ie, three times as much power is dissipated by the amplifier as waste heat as is used to drive the loudspeaker (see "Sam's Space" in this issue).
John Atkinson  |  Mar 10, 2010  |  5 comments
"If you've ever wondered what the future of recorded music is going to sound (and look) like, you should be sure to check out the AIX Records demonstration in the Port Ballroom," said the AIX/iTrax.com ad in the Axpona show guide. I started my Show itinerary by visiting this room, and in some ways, nothing I subsequently heard at Axpona matched it. Mark Waldrep was demonstrating his surround recordings in full 24/96 resolution from Blu-ray, played on an Oppo player, with five Thiel CS3.7 speakers and two Thiel subs driven by Boulder preamps and amps via DH Labs cabling. The AIX recordings I auditioned ranged from solo guitar and piano to full big band, and all were enveloping in a manner I have never experienced on even the best two-channel system. Adding to the experience was true High-Definition (1080p) video projection using a very bright, sharp projector from Wolf (distributed in the US by Sumiko). Mark always shoots HD video at his sessions, and he also provides a unique choice in that the listener can choose between audience and stage perpectives. I had assumed that most people would prefer the audience perspective, with the ambience at the rear as at a concert hall, rather than the stage perspective, where the listener is surrounded by the musicians. Mark corrected me: the feedback he gets back from AIX customers indicates that the full immersive experience is what people prefer.
John Atkinson  |  Mar 10, 2010  |  6 comments
I had respected more than loved the Legacy speakers I have heard in the past, but without a doubt one of the best two-channel sounds I heard at Axpona was provided by the giant Helix loudspeaker, shown here with Legacy founder/designer Bill Dudleston. Front-end at the Show was an Ayon CD player, and the speaker's crossover is implemented in the digital domain using FIR filters and 24-bit DACs and the six channels of amplification were provided by two three-channel McIntosh MC303 amplifiers. The speaker is actually a four-way; there is a rear-facing 15" subwoofer driven by twin ICE-Power class-D modules. The front-facing, open-baffle–loaded upper woofers are actually backed up by second units, which, as with a twin-diaphragm microphone, gives a cardioid directional pattern, allowing a more optimal match with the room's acoustics than with a conventional omnidirectional bass unit. Completing the drive-unit complement, twin silk-dome tweeters are arranged side-by-side and are flanked by four midrange units. Considering what you get, the price of the Helix is a not-unreasonable $46,000/system, including the DSP/DAC crossover unit.
John Atkinson  |  Mar 10, 2010  |  0 comments
Stereophile Shows in the past always had full programs of live music, to allow Showgoers to recalibrate their ears. While Axpona had a live concert Friday night featuring Steve Davies on guitar and vocals and John Yurick on keyboards, with me guesting on bass, this was for exhibitors and press only. Fortunately, John Yurick performed live on piano in the hotel's lobby during Show hours, offering up some excellent jazz standards.
John Atkinson  |  Mar 10, 2010  |  4 comments
"That's a familiar sound," I thought as I entered the 5th-floor suite shared by YG Acoustics and Krell. It was the classic Show dem record from the early 1980s, James Newton Howard & Friends on Sheffield Lab. The speakers were the YG Anat Reference II Studios ($70,000/system), which differ from the Anat Reference II Professional reviewed by Wes Phillips a year ago in not having the powered subwoofer modules. The room was problematic at low frequencies—either there was an upper-bass suckout or there was too much upper bass—and YG's Dick Diamond had spent long hours optimizing the sound on set-up day, but the effort was obviously worth it.
John Atkinson  |  Mar 10, 2010  |  2 comments
As you will see from the forthcoming May issue of Stereophile, modern horn speakers don't suffer from the colorations and idiosyncrasies that plagued the genre in earlier decades. Such was the case in the room shared by Aaudio Imports and Sanibel, FL retailer Lee Island Audio. The German Acapella High Violoncello II speakers ($80,500/pair) with their ionic tweeters, driven by Einstein The Turntable's Choice phono preamp ($9,800), Einstein The Tube Mk.2 balanced line stage ($18,400), and a pair of Einstein The Final Cut tubed OTL monoblocks ($34,900/pair), connected with Stage III interconnects, speaker cables, and AC power cords, produced a seamless soundstage and a smoothly coherent tonal picture. With the LP of Rickie Lee Jones singing "Chuck E's in Love," played on a Galibier Stevio turntable ($15,000) fitted with a Triplanar Mk.VII tonearm and a Dynavector XV1s phono cartridge ($5250), the sound was one of the best I heard at Axpona. I have asked Aaudio Imports' Brian Ackerman for review samples of the Acapella speakers.
John Atkinson  |  Mar 10, 2010  |  1 comments
At the other end of the large room shared by Definitive Electronics and Michael Chafee Enterprises from the Genelec-based surround system that Jason blogged about, renowned mastering engineer Bob Katz was playing 24-bit/96kHz files handpicked from his portfolio. Speakers were the superb Revel Ultima Salon2s driven by a solid-state Balanced Audio Technology power amp, hooked up with Nordost cabling.

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