The tweeter, midrange and bass drivers -- twenty in total per pair of speakers -- are all made by YG Acoustics using its proprietary BilletCore technology. The brand-new tweeter is said to be ". . . YG Acoustics' most complex mechanical invention to date." It mates a resonance-free soft dome with a stiff, light airframe machined from aluminum billet. It weighs 30 milligrams yet has sections that are 14 times thicker than a traditional hard dome.
The Sonja XV's ViseCoil bass inductors are completely wound in-house, then encased in a milled "vise-like" structure to eliminate vibration and tighten tolerances. They are said to help create better-controlled bass with greater impact. YG Acoustics'-made inductors are also used along with the Sonja XV's tweeter and midrange drivers.
Quoted frequency response for the Sonja XV is "below 20Hz to above 40kHz." Sensitivity is 88dB/2.83V/m and impedance is 4 ohms. Altogether, the Sonja XV weighs 463 pounds per channel. Existing pairs of Sonja speakers can be upgraded to Sonja XV without the need for complete replacement.
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