AXPONA 2011

There was nothing dirty, mean, or mighty unclean about the Audio Power Labs TNT 833 monoblock power amplifier, a pure class-A, push-pull design rated to deliver 200W into 8 ohms. Each amp weighs 160 lbs and uses 833C output tubes, 6550 driver tubes, and 12BH7 pre-driver tubes. The price will be somewhere between $150,000–$170,000/pair.

The system, including an Audio Research LS27 preamplifier, Musical Fidelity M6CD CD player, Vandersteen 3A loudspeakers, and aided by an array of RealTraps room treatments, produced big, robust voices, and had a good sense of musical flow.

Audio Power Labs’ Clyde Holobaugh confessed that the TNT 833 has been “a labor of love,” requiring over two years in design and development. His goal was to build a class-A, push-pull design that would be powerful, while also eliminating distortion.

On Thursday night, I attended a fantastic dinner at a “beer bar” called The Porter, in the colorful Little Five Points section of Atlanta. As my good friend Michael Lavorgna says, any place with the words “beer” and “bar” in its name has got to be at least half great. And The Porter, as it turned out, was all great. If you’re ever in Atlanta, go!

But before you go to The Porter, you should first go to Criminal Records, a wonderful record store. I didn’t go in on Thursday night, but Michael Fremer quietly wandered away from our group and snuck inside for a bit. As we sat around our table, drinking Dog Fish Head and Victory, we made guesses as to when Mikey would finally arrive. We were all wrong: We had had two rounds and had finished almost all of the appetizers by the time Mikey finally joined us. He came in with a stack of beautiful $1 LPs, and displayed them throughout our dinner.

“Have you ever heard this?” he asked me.

“No.”

“Oh, it’s great. Here, take this. I’ve got a bunch of them.”

And that’s the story of how I got a pristine copy of As Falls Wichita, So Falls Wichita Falls, by Pat Metheny & Lyle Mays. Thanks, Mikey!

The room shared by Audio Physic and Esoteric was one I returned to, as I couldn't quite believe the superb treble quality being produced by the 25th Anniversary edition of Audio Physic's Virgo speaker (to the right of the photo, $12,800/pair). Couldn't believe it? It was because this speaker was using a cone tweeter. But as AP's Reinhard Goerner explained, with the break-up problems of soft-dome tweeters now well-understood, it made engineering sense to use a cone. The Virgo's aluminum-cone midrange unit features a cast basket with minimal surface area to interfere with the diaphragm's backwave and the twin woofers are mounted on the enclosure sides to minimize vibrational excitation. Esoteric was featuring. . .

There was a big, physical, purposeful, yet delicate sound coming from the Aaudio Imports/Cruze First Audio room.

The system was made of Lansche No. 5.1 loudspeakers ($45,000/pair); BMC AMP M1 monoblock power amplifiers ($15,580/pair), BDCD1 belt-drive CD player/transport ($5790), DAC1 PRE D/A converter/preamp ($5790), and MCCI MC phono preamp ($3890); Bergmann Magne turntable and tonearm ($12,000); Stage III Mantikor speaker cables ($16,500/2.5 m), Gryphon interconnects ($6300/1m), and Analord Prime phono cable ($2900); Stage III Vortex ($2400/1.5m), Monotaur ($4000), and Zyklop ($6000/1.5m) power cords; Weizhi PRS-6 Pure power distributor ($3200); and Acapella Fondato Silenzio base ($3100) and LaMusika Puck/3 couplers ($490).

I sort of just zoned out in this room, nodding my head to the music, which transported me easily to some comfortable, smoky jazz club in 1950s New York City.

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.

While making my way to the Goldmine seminar room at Axpona, to catch Michael Fremer's turntable set-up talk, I came across pianist John Yurick playing some smooth jazz improvisations to a background of a Lamborghini and Aston Martin that happened to be parked in front of the Stereophile booth.

Throughout the show, the Audioengine room was almost always busy; attendees seemed very attracted to the technology, design, and prices of Audioengine’s small, versatile speakers. When I walked in, a pair of A5 powered loudspeakers ($349/pair) were playing, and it was interesting to note their familiar sound, even while in an crowded and unfamiliar environment. My discussion of the A5 appears in our May issue, copies of which were being distributed in the Audioengine room and throughout Axpona.

Audioengine’s Brett Bargenquast was happy he’d decided to exhibit at the show. Traffic was steady, and the company sold several pairs of speakers during the three-day event.