John Atkinson

Sort By: Post Date | Title | Publish Date
John Atkinson  |  Oct 22, 2013  |  1 comments
Wired with Transparent cables, the extreme audio system in the large room at the Denver Tech Center Hyatt—dCS Vivaldi digital source, VTL TL7.5 III preamp, VTL Siegfried power amps, Wilson Alexandria XLF speakers driven full-range and twin Thor's Hammer subwoofers driven by 250Wpc Parasound Halo A 21 amplifiers below 38Hz—worked its magic both on the disco-meets-EDM of Daft Punk's "Lose Yourself to Dance" and the delicate harmonic traceries of Dave Wilson's Debussy violin sonata recording transferred to DSD by Puget Sound's Bruce Brown. In both cases, there was a sense of loss when the music stopped. It is difficult to imagine how music reproduction could get any better than what I heard in this room the Saturday afternoon of the show!
John Atkinson  |  Oct 22, 2013  |  0 comments
Bel Canto's John Stronczer was excited. "The Powerstream amplifier's S/N ratio is 120dB measured at the speaker terminals!" I was impressed. This is equivalent to 20-bit digital audio, which means this digital-input monoblock, which costs $15,000 each, is one of the quietest amplifiers I have encountered. It offers 300W into 8 ohms, 1200W into 2 ohms. Audio data presented to the ST-optical inputs are reclocked and then converted to analog with a BurrBrown PCM1792. The analog signal is then fed to an output stage based on the well-regarded Hypex class-D modules, used in a proprietary low-gain configuration to maximize dynamic range.
John Atkinson  |  Oct 21, 2013  |  0 comments
These nice-looking standmounts are Salk Sound's Exoticas ($6000/pair), which use new high-performance drive-units from SEAS. Driven by an AVA solid-state amp (bottom in the rack), they produced a natural sound on a Kimber IsoMike cello recording. But when I first entered this room, the less-expensive, floorstanding Salk Sound Towers, which sell for less than $2000/pair, were producing a big sound on a Trentemoller track, driven by AVA's Ultravalve tube amplifier ($1995, above the solid-state amp in the rack), which gets 35Wpc from a pair of EL34s per channel. Preamplifier was AVA's new FET-Valve CF.
John Atkinson  |  Oct 21, 2013  |  0 comments
Bent Holter, founder of and designer for the Norwegian company Hegel, explained that his circuits are based on work he had done designing ultra–low-noise preamplifiers for the European CERN laboratory. Hegel's new H80 D/A integrated amplifier ($2000) replaces the H70, which was introduced in 2010, and uses the low-noise preamp circuit from the $5500 H300 amplifier and Hegel's patented feed-forward "Sound Engine" amplifier topology. It has two single-ended analog inputs, one balanced analog input, and five digital inputs, including USB. Though this doesn't operate in the usual asynchronous mode, it uses a proprietary topology said to eliminate jitter. The H80 offers 75Wpc into 8 ohms compared with the H70's 70W.
John Atkinson  |  Oct 21, 2013  |  0 comments
Denver retailer Gold Sound was featuring Focal's new tower speaker, the Aria 948 ($5000/pair), in its room at RMAF, in a system featuring a Cambridge Audio 851E preamp ($1799) and Cambridge 851W 200–350Wpc amplifier ($2499), both also new at the show. Front ends were either a Cambridge 851C CD player or a VPI Classic turntable fitted with the 3D-printed tonearm and an Ortofon Cadenza Bronze MC cartridge and amplified with a Parasound Halo JC3 phono preamp.
John Atkinson  |  Oct 21, 2013  |  0 comments
I went into the SimpliFi room expecting to see the excellent Weiss MAN301 media player and effective DSPeaker room correction and D/A devices. Yes, there were there at RMAF but SimpliFi's Tim Ryan wanted to talk about the Swiss Klangwerk Ella active speaker ($15,000/pair) shown in my photo. This modest-looking floorstander uses DSP to make it work as a time-aligned virtual point source. A constrained layer-damped Corian front baffle supports an advanced Aerogel-dome tweeter from Audax and a 5.5" woofer; two more 5.5" woofers covering the same passband are placed on the speaker's sides, and all three are reflex-loaded with a downward-firing port. The advantage of this design is that it has a wide listening window on both vertical and horizontal planes, explained Tim, and indeed, on Dire Straits' "Brothers in Arms," I found that I could move up and down and from side to side without any significant change in the perceived balance.
John Atkinson  |  Oct 21, 2013  |  1 comments
"That's a lot of bass!" I was listening to the audiophile version of Nine-Inch-Nails' "A copy of a copy..." on Bryston's three-way Mini-T stand-mounted speakers ($2695/pair). The speaker's woofer has a large half-roll surround, suggesting good linearity at large excursions, which was confirmed by the fullrange sound in the room. The rest of the system included Bryston 28B monoblocks, hooked up with StraightWire cables and with a Bryston BDP-2 file player and BDA-1 DAC as the source.
John Atkinson  |  Oct 21, 2013  |  0 comments
I had been impressed by the 5.1 speaker from the German Lansche company when I reviewed it in July 2012. In particular, I found Lansche's horn-loaded ionic tweeter produced superb treble sound quality. At RMAF, I photographed Aaudio's Brian Ackerman standing by the enormous, 900lb Lansche 8.2 ($266,000/pair in Macassar ebony veneer), which combines that ionic tweeter with four 8" mid/woofers, crossed over at 2.5kHz.
John Atkinson  |  Oct 21, 2013  |  6 comments
When Jason Serinus visited the room shared by DeVore Fidelity, Tone Imports, and Oregon dealer Eugene Hi-Fi, the $12,000/pair Orangutan O/96 speakers that are Art Dudley's new reference and are shown in Jason's photo were playing. But when I visited the room, the smaller, floorstanding Orangutan O/93s ($8400/pair) were playing, and sounding very good indeed on a favorite Stephen Mejias album from Jenny Hval. (However, don't ask me about my reaction to the lyrics, which involved Ms. Hval applying an electric toothbrush to a body part other than her teeth.)
John Atkinson  |  Oct 21, 2013  |  1 comments
"Together, We Make Beautiful Music" proclaimed the one-sheet that was handed to me in this room. "You are listening to a complete audio system that cost under $15,000," it continued, adding that "we put together this relatively modest playback system to better demonstrate the musical purity and refinement produced with products manufactured by: Mojo Audio, Atomic Audio Labs, VH Audio." $15,000 doesn't sound "relatively modest" to me, but the sound in this room was surprisingly good considering that the speakers were a DIY design using a full-range 8" unit and the amplifiers were vintage Allen organ tube models, based on the Williamson circuit.

Pages