YG Acoustics Sonja XV flagship Speakers New

Sonja XV is an extreme, four­ tower version of Sonja, created to celebrate YG Acoustics’ upcoming 15 year anniversary (2002­-2017). It combines everything that YG Acoustics knows about speaker­ design, and incorporates several next ­generation 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 in­ house, and proprietary cost­ no­ object bass inductors. These enhancements, together with an ability to move near­ limitless amounts of air, result in an effortless listening experience that is typically only associated with a live musical performance.

The bass, mid bass and midrange units are made in­ house using YG Acoustics’ proprietary BilletCore technology: the drivers are precisely machined out of massive slabs of air craft ­grade aluminum. This unique process offers overwhelmingly superior dynamics, musical delicacy and low distortion due to industry­leading rigidity and accuracy (tight tolerances). A pair of SonjaTM XV utilizes a total of 18 BilletCoreTM drivers.

The brand new BilletDome TM tweeter is YG Acoustics’ most complex mechanical invention to date: a resonance­ free 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 age­ old debate of hard versus soft, by combining the best of both.

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

YG AcousticsTM crossover circuits are all created using proprietary software developed entirely in­ house. DualCoherent TM 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 AcousticsTM has the ability to optimize both domains simultaneously.

Sonja TM XV’s bass crossover uses a brand new technology: ViseCoil TM inductors are CNC­ wound in­ house, 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.

SonjaTM XV’s mid and tweeter crossover uses ToroAir TM technology: in­ house CNC ­wound toroidal air­ core inductors are unique in eliminating cross­talk (cross­ contamination) common in crossover circuits. The result is preservation of high­ frequency detail without harshness, brightness or sibilance.

SonjaTM XV’s exquisite cabinet combines visual refinement with over ­engineering. It is constructed of precision ­machined aircraft­ grade aluminum alloy. This material, using vibration ­free 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.

Focused Elimination TM anti­ resonance 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 enclosure­ free concepts.

YG AcousticsTM speakers are not voiced. All measurements are verified using extensive listening tests, but the speakers are not artificially manipulated. YG AcousticsTM speakers simply convey the recording – nothing more, nothing less.

The end­ result: Sonja TM XV is the closest that YG Acoustics TM 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

AcousticsTM 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 SonjaTM XV”.

Expansions and Upgrades

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

Sonja TM XV, in addition to its state­ of­ the ­art two­ channel (stereo) performance, is also fully compatible with multi­channel audio and home ­theater systems. SonjaTM XV can also be combined with speakers from YG Acoustics TM’ other lines for properly phase ­coherent 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 BilletCoreTM ultra­high­rigidity woofers, mid­woofers and mids BilletDomeTM ultra­low­distortion tweeter, unique to SonjaTM XV
SonjaTM XV is fully­passive
Proprietary DualCoherentTM crossover at 65 Hz, 337 Hz and 1.75 kHz
Designed using software developed in­house
ViseCoilTM bass inductors reduce residual loss and improve linearity, for greater bass impact and an easier job for most amplifiers
ToroAirTM 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