John Atkinson

Going into the Audio Arts room at CES was like going through a time portal into the 1986 CES, as Flim and the BB's classic album Tricycle was playing. The system was based on the top-line Zellaton speakers ($79,750/pair) driven by Swiss CH amplification connected with Schnerzinger cables. According to the meters on the Precision M1 monoblocks ($94,750/pair), while the average level was 4–5W, the peaks on the drums reached 360W and more! Yet the sound remained clean and uncompressed. An impressive if expensive sound.

The speakers from Colorado-based Avalon Acoustics have either featured conventional, rectangular boxes (in the less-expensive NP series, like the Evolution 2.0 I reviewed last July) or the unique, multifaceted enclosures that I first saw in 1990's Eclipse, which are used in the cost-no-object designs like the Indra.

Back in the summer of 2009, USB-connected D/A processors that could operate at sample rates greater than 48kHz were rare. Ayre Acoustics had just released its groundbreaking QB-9, one of the first DACs to use Gordon Rankin's Streamlength code for Texas Instruments' TAS1020 USB 1.1 receiver chip. Streamlength allowed the chip to operate in the sonically beneficial asynchronous mode, where the PC sourcing the audio data is slaved to the DAC. But high-performance, USB-connected DACs like the Ayre were also relatively expensive back then, so in the January 2010 issue of Stereophile I reviewed a pair of soundcards from major computer manufacturer ASUS , the Xonar Essence ST and STX, which, at $200, offered a much more cost-effective means of playing hi-rez files on a PC.

Jon Iverson already reported on the Antelope DAC, but as I have just favorably reviewed their SCM 7 v.3 minimonitor for the forthcoming April issue of Stereophile, I was more interested in the active ATC SCM100SL Towers in the room. This speaker combines ATC's proprietary soft-dome midrange driver with a 1" tweeter and 12" woofer, tri-amped by ATC's Anniversary amplification. With a laptop running JRiver Media Center feeding data to the Antelope Zodiac-Platinum DAC with its Voltikus power supply, the 24/96 transfer of Steely Dan's "Babylon Sisters" was reproduced with tight, well-controlled low frequencies.