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Velodyne introduced their series II subwoofer line in the fall of 1988, and it seems timely to review their largest, most powerful unit, the ULD-18. As the line's flagship, this Velodyne subwoofer represents the most sophisticated and expensive system offered by the company. It is sold as a system, complete with driver, enclosure, amplifier, control unit, electronic crossover, and servo cable and circuitry. Velodyne's unique servo circuitry, manufacturing techniques, and aggressive sales technique emanate from the company's designer, David Hall.

Love 'em or hate 'em, headphones serve a purpose. My first headphones were Kosses, and they were perfect for use in a college dorm. While I've always owned a pair or more over the years, somehow they never became my primary mode of listening, except in situations where using loudspeakers at satisfying levels risked eviction, bodily harm, or both.

Towering Alan Dwight Hulsebus of Raven Design Studio was proud to show off the unusual skeleton of his Raven Ebb loudspeaker ($12,000/pair). Manufactured and designed in Camarillo, CA, the speaker includes a proprietary Raven ribbon and Focal drivers (including two rear-firing drivers to optimize room interactions), and is wired with Clarity cable. (Exhibitor Orca Design and Manufacturing distributes Focal in the US.) Claiming a frequency response of 40Hz–50kHz ±3dB, with a nominal impedance of 6 ohms and minimal impedance of 5 ohms, the 86dB-sensitive loudspeaker was paired with Superlative Audio's SSA-250 50Wpc amplifiers ($30,000/pair), Oppo BDP-83 SE player ($899), Benchmark DAC1 HDR DAC/preamp ($1799), and a host of Clarity cable.

Bob Walters, coordinator of the Bay Area Audiophile Society, pegged Tonian Acoustics as one of the best-sounding loudspeaker exhibits at the Show. If only I could share his enthusiasm for the Tonian Acoustic Classic 7.1 ($5500/pair), a 16 ohm loudspeaker with 95dB sensitivity is inexplicably absent from the <A HREF="http://www.tonianlabs.com">Tonian Acoustics website</A>.

Just as I entered Emeryville's Hilton Garden Inn on the final day of the show, YG Acoustics' Yoav Geva (fourth from left) and his extended family were making their first visit to the Hilton. Filling most of an elevator, our little passel of smiling faces made its way to the YG Acoustics room.

One of the reasons for Acoustic Zen's Robert Lee journey north was to visit his extended family, part of which lives in Millbrae. When I encountered them on the final day of the show, I could not get over how beautiful his grandchildren look. No wonder Robert's tweeter sings so sweetly.

Fritz Heiler of southern California has been building custom loudspeaker systems for 37 years. Called into action at CAS 2010 were his Carbon 7s ($1750/pair shipped, or $1650/pair for show attendees who acted in time). Equipped with ScanSpeak drivers, these babies have a frequency response of 39Hz&#150;20kHz, &#177;3dB, and a sensitivity of 88dB. Their special crossover is free of caps and resistors, having only one small inductor on the mid/bass driver.