John Atkinson

Called "BilletCore" by the Colorado company, the aluminum cone for the midrange and low-frequency drive-units used in the top-of-the-line Anat III Reference ($111,000/system) and the smaller three-way Kipod is milled from a solid block of aluminum. In the case of the Anat subwoofer, the starting point is a billet of aluminum 2.5" thick weighing 16 lbs, compared with the finished cone after a day of work, which is 0.008" thick and weighs less than 1 ounce. Stiffening ribs are left on the rear of the cone and the final step is to black-anodize the aluminum. The benefit of machining the cone is said to be improved unit-unit consistency and rigidity compared with a conventional spun, cast, or pressed metal diaphragm, which pushes break-up modes even farther out-of-band.

Though YG was in the same room as in previous CESes, they had taken heroic measures this year to tame its acoustics, as can be seen from the photo. The result was worth the effort. In a system that included dCS Scarlatti digital front-end, a Veloce battery-powered preamp, Tenor 350M monoblocks, and Kubala-Sosna Master Reference cables, the Anat II Reference produced a warm, detailed, full-range sound. Particularly impressive was a version of Sting's "Roxanne" from Italian singer Petra Magoni of Musica Nuda. Both the voice and the solo double bass accompaniment had a palpable presence but without sounding forced or exaggerated.

Each 12" woofer uses a fiber-glass–reinforced paper cone and is loaded by what is referred to as "a hybrid form of horn-resonator and bass reflex design." The mid/HF module is coupled to the woofer modules with spheres of varying hardness, to drain vibrations optimally, and can be adjusted to bring the drivers into proper time alignment at the listening position. The midrange unit features a papyrus cone with an elmwood phase plug and an alnico magnet, while the enclosure is filled with wool from "locally raised sheep" to reduce internal reflections being retransmitted through the drive-unit cone. The tweeter uses a titanium nitride dome loaded with a Tractrix-flare horn, while the supertweeter is a diamond-diaphragm type. The upper-range crossover is passive; the woofers are fed via a line-level crossover, and internal wiring is all Cardas Clear.

The Siennas were demmed in a system comprising Dr. Feikert turntable and tonearm, Abbingdon Music Research CD player, phono preamp, and integrated amplifier, with Acoustic System racks and cables, but I will hand over to Jason Serinus for some additional thoughts: