CES 2011
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CES 2011
Jason Victor Serinus Jan 11, 2011 0 comments
Allen Sung, owner of XLO (left), introduced the Purple Rush power cord ($7000/6ft). The first product in the company’s new Purple Reigns series, this substantial baby is heavy enough to easily yank a poorly positioned component off the shelf. IMHO, the cable’s oversized proprietary connectors are as impressive as its girth.

XLO’s designer, Jay Victor (right), explained that he wanted to design a power cable that he could use on high-current power amps in his own system. “I started dabbling in cable design when I was in charge of product development at Monster Cable with Demian Martin,” he said. “We were marveling at how much of a difference different power cables made to a system’s sound. I kept refining my ideas of power cable design, until I came up with idea of mixing different conductor shapes to best convey the whole range of bass sound.”

Victor believes that a large solid conductor is great for low bass, a flat conductor is best for mid bass, and a polymer coated Litz works best for highs and transients. He has combined all three in the Purple Rush power cord. The cord also employs an exotic field-balanced winding technique to lower the noise floor and cancel magnetic effects. All in all, five patents are associated with the Purple Rush power cord, which took eight years to develop and refine.

CES 2011
John Atkinson Jan 14, 2011 0 comments
Utah-based Zu Audio does indeed goes its own way, with retro, almost-full-range pulp-cone drive-units used in high-sensitivity designs. (See Art Dudley's review of the $4000/pair Essence in the October 2009 Stereophile. All of Zu's speakers have been moderately priced, so I was not expecting to see and hear a design costing $40,000/pair when I went into the Zu room at T.H.E. Show.

The Dominance uses three 10" paper-cone drivers, each with a whizzer cone, to cover the range from 27Hz to 12kHz. Each is in its own sub-enclosure featuring Zu's proprietary ZuRG loading (See AD's review) with the outer two tuned identically and the central drive-unit adjusted to give a bit more upper-midrange energy. There is also a downward-firing 15" subwoofer, covering the octave below 27Hz, and completing the line-up are two horn-loaded ring-radiator tweeters operating above 12kHz. Unusually, these are placed at the top and bottom of the Dominance.

For the dem, the subwoofer was powered by a Pass Labs XA30.5 but the main drive-units were driven by a 1.5Wpc Yamamoto SET amp. Yup, just 1.5W, but the Dominances still managed to fill the room with sound. Lows were tight and extended; imaging was tangible; jump factor was startling; but I couldn't get away from a touch of character in the mid-treble imparted by those whizzer cones.

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