A little backgrounder on X-719:
Usher Audio Technology Compass X-719 loudspeaker
Robert Reina, May, 2004
...The Compass X-719 was jointly designed by Dr. Joseph D'Appolito (of the eponymous midrange-tweeter-midrange driver array, now chief engineer at Snell Acoustics) and Usher's Tsai Lien-Shui, and is manufactured in Usher's factory in Taipei.
Both the X-719's drive-units are sourced from Taiwan. The 1" tweeter uses a silk diaphragm, with a moderate-viscosity magnetic fluid used in the voice-coil gap to dissipate heat and improve mechanical linearity. Usher claims that the tweeter is capable of reaching much lower in frequency than typical tweeters. The X-719 therefore features a lower crossover point than usual, 2kHz, which relieves the bass/midrange unit of the need to reproduce higher frequencies, which Usher claims results in superior definition. The crossover is a fourth-order acoustic design. The cast-aluminum-framed 7" woofer uses a paper cone filled with carbon fiber to increase stiffness and to damp resonances. Reflex loading is provided by a 2"-diameter port on the cabinet rear. The woofer motor has a T-shaped pole-piece with a copper sleeve and shorting ring, and provides for a peak-peak "throw" of 12mm.
The biwirable X-719's substantial cabinet has thick walls of MDF and interlocking internal braces. Actually, "substantial" is an understatement. At 37 lbs each, the not unusually large X-719 is by far the heaviest bookshelf speaker I've ever reviewed—and by far the most attractive. The cabinets have rounded edges, and my review samples were finished in an attractive black-gloss, automotive-like lacquer, with elegantly finished side panels of dark, real wood.
To ensure consistency with my continuing series of reviews of budget speakers, I set the X-719s on my trusty Celestion Si stands, declining Usher's offer to supply their own $400/pair stands. After seeing a photo of Usher's RSW708 stand, however, I regretted my decision—when coupled with the X-719, the stand's combination of wood uprights and stone base makes a striking visual statement.
Full review on:
http://www.stereophile.com/loudspeakerreviews/504usher/