Apple AirPods Pro 3: First Impressions

Sponsored: Radiant Acoustics Clarity 6.2 | Technology Introduction

Hegel H150 Integrated Amplifier Officially Announced

Sonus faber Announces Amati Supreme Speaker

FiiO M27 Headphone DAC Amplifier Released

Audio Advice Acquires The Sound Room

LATEST ADDITIONS

AXPONA 2011

Hot Stuff from Rosso Fiorentini & AMR

John Atkinson Apr 17, 2011

The Avatar Acoustics room featured the Rosso Fiorentini Siena speakers ($24,995/pair) that made their North American debut at last January's CES, seen here with Avatar's Darren Censullo. A four-way sealed-box design, the Siena features two 8" aluminum-cone woofers, a 6.5" paper-cone midrange unit, a 1" silk-dome tweeter, and a Murata ultrasonic generator and produced a big sweep of sound on what appeared to be the Show's ubiquitous dem track, Nils Lofgren's live acoustic number "Keith Don't Go," driven by an AMR AM-77.1 integrated amplifier. But converting Nils' bits from an AMR CD-77.1 CD player used as a transport was AMR's new DP-77 D/A converter ($4995). Uniquely, this offers a choice of two DAC chips, one a non-oversampling 16-bit type which is recommended for CD playback, the other a 32-bit type optimized for playback of high sample-rate data, which offers minimum-phase, apodizing, and "organic" reconstruction filters.

The DP-77 has an asynchronous USB input that can accept data with sample rates up to 192kHz and jitter is reduced by using a high-precision clock and rather than adjusting its frequency in continuous steps to match the average rate of the incoming data, which can allow jitter to bleed through to the DAC chip, the DP-77's clock switches between 28 million discrete frequencies.

AXPONA 2011

Acoustic Zen's Transmission Lines

John Atkinson Apr 17, 2011

I have never been a fan of transmission-line speakers. My experience has been that too often resonant problems in the line color the speaker's upper bass. But I didn't hear any such problems with the Acoustic Zen Crescendo speakers ($16,000/pair), seen here with designer Robert Lee. The Crescendo combines two 5" midrange units with magnesium-impregnated paper cones placed either side of a horn-loaded tweeter with two 8" woofers that use ceramic-coated "non-pressed" paper cones, these loaded with a transmission line venting at the speaker's base. Driven by a Triode Corporation 20Wpc TRV-845SE integrated amplifier ($6000), which uses two 845 output tubes running in class-A, and a Triode TRV-CD4SE CD player, the sound in this room was uncolored and extended at both frequency extremes, revealed by a superb recording of a female singer accompanied by a double bass.

AXPONA 2011

MBL Conquers Room Acoustics

John Atkinson Apr 17, 2011

MBL's Jeremy Bryan had an interesting problem when set up his system at Axpona, in that while the hotel room was large, it was also double-story, with a 16' ceiling and an acoustic nightmare of a mezzanine level at the rear. Jeremy, shown in the photo next to the unanticipated in-room stairway, solved it by packing the mezzanine floor with queen-size mattresses that had been emptied from other hotel rooms. The system was the same used at SSI in Montreal two weeks ago101E Mk.2 omnidirectional speakers driven by gigantic 9011 monoblock amplifiers, a 6010D preamp, a 1621A CD transport, and a 1611F D/A converterand I listened to the same hi-rez solo piano recording made by MBL's long-time chief engineer Jürgen Reis, "Walchensee, Mondnacht," performed by Martin Vatter, from the album Klangbilder. Once again, the piano sound was disturbingly lifelike, with full-range dynamics.

AXPONA 2011

Sanders' Electrostatics

John Atkinson Apr 17, 2011

Back in the day, you couldn't cruise the corridors at an audio Show without hearing Willie Nelson's arrangement of "Stardust" coming from every open door. So it was with a feeling of nostalgia that I walked into the Sanders room at Axpona and heard that familiar voice. Providing the tunes was an all-Sanders system featuring the Model 10c speakers ($13,000/pair including 500Wpc bass amplifier and crossover module), which combines an electrostatic panels for the midrange and highs with a transmission line-loaded 10" moving-coil woofer. Unusually, the active crossover operates in the digital domain, operating at 24/96 and splitting the signal at 172Hz with 48dB/octave slopes, which should ameliorate the problem blending the omnidirectional woofer with the dipolar panel. With a Sanders line stage, Sanders electrostatic amplifier ($4000), and Sanders cablesRoger Sanders feels strongly that a system should designed as a systemthe 10cs sounded unexpectedly dynamic.

AXPONA 2011

The Daniel Hertz M1

Stephen Mejias Apr 16, 2011

The Daniel Hertz M1 ($100,000/pair), designed by Mark Levinson (the man), uses a high-frequency horn, a 12” mid-woofer, and an 18” woofer. The stainless steel frame surrounding the horn is said to optimize waveform termination and imaging quality, while those frames surrounding the woofers are used to increase the rigidity of the drivers. The speaker is divided internally into two sections: One section for the horn and 12” driver, damped using sheep’s wool for its high mass and absorptive properties, and one section with two tuned ports for the 18” driver.

As seen here, the M1 is designed to be powered by four Telikos M5 Mono Reference amplifiers ($8000 each): Each channel uses one M5 switched to frequencies above 80Hz and one M5 switched to frequencies below 80Hz. Also in the system was a Telikos M6 preamp ($10,000). The source was a $400 laptop running WAV files from iTunes.

Interesting story: Daniel Hertz (the company) takes its name from the two sides of Mark Levinson’s family. Daniel Levinson was Mark’s father, while Heinrich Hertz (1857-1894), a German physicist and the first to demonstrate the existence of electromagnetic waves, was Mark’s great uncle on his mother’s side.

AXPONA 2011

The YG Acoustics Anat III Signature

Stephen Mejias Apr 16, 2011

The YG Acoustics Anat III Signature ($119,000/pair) employs a new circuit in its main module which enables the speaker to play louder while minimizing midrange distortion. Though the Anat maintains its rated sensitivity of 89dB, its impedance is more even, which should make the speaker easier to drive. Completing the system were a Veloce preamp, Krell 402 amplifier, dCS Scarlatti system, and Kubala Sosna Elation cables.

Alright. As some graceful piano came slowly tinkling into the room, I was immediately struck by the system’s combination of scale and delicacy. And when the first voice came in, it was one of those holy shit moments. And when the second voice came in, it was another one of those holy shit moments. And when the two voices came together, all I could do was sit there and grin like a dummy, in awe of the texture and tone and exquisite delineation of images. And then the percussion&#151fast and clean and authoritative. It added up to a compelling complete performance, just as sonically impressive as it was emotionally involving.

I heard myself thinking wild thoughts: It’s incredible that reproduced music can sound this good…. Sitting there listening to Herbie Hancock’s The Imagine Project, I was having the same sort of reaction as when walking the halls of a museum or strolling down 34th Street between Fifth and Sixth Avenues, looking up at the Empire State Building: I’m just sort of amazed that humans can create such beauty.

AXPONA 2011

Miles and Miles of Tweaks

Stephen Mejias Apr 16, 2011

Well, not really miles, but definitely a lot. Feet and cones and spikes and pucks and all sorts of fun stuff. I kinda just wanted to run as fast as I could and fling myself right up onto this table to swim with all of these little goodies. But I managed to restrain myself.

AXPONA 2011

DaVinci USB DAC Does 384kHz

John Atkinson Apr 16, 2011

"It's fitting for the world premier of the Da Vinci 384k DAC to happen on the first day of Axpona," explained Light Harmonic's Larry Ho, "as today is Leonardo da Vinci's birthday." 384k? Yes, the Da Vinci DAC ($11,999 regular price, $8999 Axpona price [NOTE: The actual retail price ended up at $20k-ed.]) will operate at sample rates up to 384kHz. At the show, in a system featuring Wilson Sophia 3 speakers driven by Pass Labs amplification, a 2L recording of Ole Bull's violin concerto, sourced from a Mac 2-modded Mac mini running Pure Music and recorded with a 352.8kHz sample rate, according to the DAC's front panel display, offered up some of the sweetest-sounding, natural violin sound and the most solid stereo imaging I have experienced from a classical recording. The 384k DAC uses the USB2.0 protocol and functions on a Mac without a driver having to be installed.

AXPONA 2011

Sutherland's Phono Block

John Atkinson Apr 16, 2011

"I made this for myself," explained the genial Ron Sutherland, as he showed me the interior of his new monophonic phono preamplifier ($9800/pair). The power supply on the right, which uses both choke and RC smoothing, feeds DC to the active circuitry on the left via a ribbon cable running in a channel machined in the front panel. Plug-in daughterboards are used to change loading and gain and three chassis grounding options allow for the lowest noisefloor: floating, grounded directly, and grounded via a 50 ohm resistor. Ron has used 1/8"-thick circuit boards to lower dielectric effects. There are two outputs to allow a mono cartridge to to be fed to both left and right inputs of the phono preamplifier.

AXPONA 2011

Bob's Devices

John Atkinson Apr 16, 2011

"A North Carolina firm called Bob's Devices has joined my list of favorite phono step-up suppliers," wrote Art Dudley in June 2010. There in the Analog Ballroom at Axpona was Bob Sattin himself, showing off his range of affordable step-ups, using selected new and vintage transformers from manufacturers like CineMag, Sowter, and Altec.