YG Acoustics™ , the leading ultra­high­end speaker manufacturer, is proud to announce its latest creation ­ Sonja™ XV.

Sonja™ XV is an extreme, four­tower version of Sonja™, created to celebrate YG Acoustics™’ upcoming 15 year anniversary (2002-­2017). It combines everything that YG Acoustics™ knows about speaker­design, and incorporates several next­generation technologies that cannot be found elsewhere. Sonja™ XV – an entirely new sonic benchmark, truly extreme in every way… handmade in U.S.A.

Innovations include, first and foremost, a breakthrough tweeter made in­house, and proprietary cost­no­object bass inductors. These enhancements, together with an ability to move near­limitless amounts of air, result in an effortless listening experience that is typically only associated with a live musical performance.

The bass, midbass and midrange units are made in­house using YG Acoustics™’ proprietary BilletCore™ technology: the drivers are precisely machined out of massive slabs of aircraft­grade aluminum. This unique process offers overwhelmingly superior dynamics, musical delicacy and low distortion due to industry­ leading rigidity and accuracy (tight tolerances). A pair of Sonja™ XV utilizes a total of 18 BilletCore™ drivers.

The brand new BilletDome™ tweeter is YG Acoustics™’ most complex mechanical invention to date: a resonance­free soft dome is supported by a stiff, light airframe machined from aluminum billet. The airframe weighs a mere 30 milligrams (a thousandth of an ounce), but its critical sections are up to 14 times thicker than a typical hard dome, so its structural strength is vastly superior even to domes made of the most exotic hard materials. Finally, a tweeter that ends the age­old debate of hard versus soft, by combining the best of both.

sonja xv_1

The tweeter’s motor is YG Acoustics™’ ingenious ForgeCore™ system: in­house CNC­cutting introduces sophisticated 3D geometries into the magnet system. The resulting improvement is greatly reduced distortion and a sense of ease to the sound.

YG Acoustics™ crossover circuits are all created using proprietary software developed entirely in­house. DualCoherent™ technology provides the best frequency response and relative phase available. Competing speakers are optimized in either the frequency domain (most common) or time domain. Only YG Acoustics™ has the ability to optimize both domains simultaneously.

Sonja™ XV’s bass crossover uses a brand new technology: ViseCoil™ inductors are CNC ­wound in­house, then encased in a vise­like milled structure to eliminate vibration and tighten tolerances. Residual loss is reduced by 24%, and linearity is improved by 60%. The result is better control over the woofers, far greater bass impact, and an easier job for most amplifiers.

Sonja™ XV’s mid and tweeter crossover uses ToroAir™ technology: in­house CNC­ wound toroidal air­core inductors are unique in eliminating cross­talk (cross­contamination) common in crossover circuits. The result is preservation of high­frequency detail without harshness, brightness or sibilance.

Sonja™ XV’s exquisite cabinet combines visual refinement with over­engineering. It is constructed of precision­machined aircraft­grade aluminum alloy. This material, using vibration­free pressurized assembly, allows for the most acoustically desirable enclosure achievable. The multi­layered structure is optimized for each module’s specific frequency range. This ensures the lowest vibration achievable, even at extreme volume levels.

FocusedElimination™ anti­resonance technology keeps mechanical losses lower than any competing speaker, by combining the minimized turbulence of a sealed design with the low friction otherwise associated with enclosure­free concepts.

YG Acoustics™ speakers are not voiced. All measurements are verified using extensive listening tests, but the speakers are not artificially manipulated. YG Acoustics™ speakers simply convey the recording – nothing more, nothing less. The end­result: Sonja™ XV is the closest that YG Acoustics™ has ever come to the natural sound of a live performance. It will be heard by few and attained by even fewer, but those who hear it will likely echo the statement that YG Acoustics™ President Yoav Geva made upon finishing his masterpiece: “From now on, when I listen to music, I want it to be either live or with Sonja™ XV”.

Expansions and Upgrades

Existing pairs of YG Acoustics™ Sonja™ can be expanded to Sonja™ XV, without the need to replace the speakers.

Sonja™ XV, in addition to its state­of­the­art two ­channel (stereo) performance, is also fully compatible with multi­channel audio and home­theater systems.

Sonja™ XV can also be combined with speakers from YG Acoustics™’ other lines for properly phase­coherent multi­channel systems.



±1 dB in the audible band
±5° relative phase throughout entire overlap
Exceptional pair­matching
Usable output extends from below 20 Hz to above 40 kHz


A four­way, four­tower system with a total of 20 drivers per pair of speakers
BilletCore™ ultra­high­rigidity woofers, mid­woofers and mids
BilletDome™ ultra­low­distortion tweeter, unique to Sonja™ XV


Sonja™ XV is fully­passive
Proprietary DualCoherent™ crossover at 65 Hz, 337 Hz and 1.75 kHz
Designed using software developed in­house
ViseCoil™ bass inductors reduce residual loss and improve linearity, for greater bass impact and an easier job for most amplifiers
ToroAir™ mid and tweeter inductors eliminate cross­talk


88 dB / 2.83 V / 1 m 2π anechoic


4Ω nominal, 3.5Ω minimum


4 towers, each 179x43x72 cm (70x17x28”) HxWxD


4 towers, each 210 kg (463 lbs) per channel unpackaged

Shipping weight of a pair is 1.3 tons

U.S. MSRP $265,900 per pair