AK SOLARIS X 5 e1624635815156

Astell&Kern SOLARIS X

AK SOLARIS X, specially tuned by Campfire Audio for Astell&Kern. SOLARIS, Campfire Audio’s high-end earphones that are highly acclaimed by audiophiles around the globe, is now reborn in collaboration with Astell&Kern.

AK SOLARIS X is a culmination of Campfire Audio’s technology. Its hybrid system, which integrates a balanced BA driver and an optimized dynamic driver, faithfully conveys Astell&Kern’s deep and rich sound.


Internal Structure



Specially Tuned 10mm Dynamic Driver
Specially Customed New Single BA Driver + T.A.E.C.

Beryllium / Copper MMCX Connector
Single Custom BA Driver
3D Printed Solid Body Acoustic Chambers
Stainless Steel Spout

The custom BA driver designed specifically for the AK SOLARIS X is smaller in size than its predecessor used in existing models and offers wideband performance. Coupled with Campfire’s patented tuned acoustic expansion chamber (T.A.E.C.) technology, the new driver also offers smooth and extended high frequencies. Another BA driver provides rich delivery of the mid-range frequencies, and the custom 10mm dynamic driver optimized for the Polarity Tuned Chamber reproduces deeper and more refined mid-to-low frequency. Each earphone integrates a 3D Printed Acoustic Chamber to enable the drivers to deliver the highest audio quality possible, creating a natural and accurate sound.

4N Pure Silver Litz Cable

AK SOLARIS X comes with a balanced 2.5mm pure silver cable allowing the earphones to reach their full performance potential. Pure Silver Litz Cable is produced with four 4N (99.99% purity) conductors to offer clearer, extended sounds. The jacket that wraps around each conductor ensures both flexibility and durability. At the same time, it is soft to touch and practical to use every day.



Tuned Acoustic Expansion Chamber. The tuned acoustic expansion chamber technology allows us to deliver extended high frequencies without sibilance or fatigue. Optimized driver performance by adjusting the volume of space available in front of the driver. This is superior to the typical “Tube+Dampener” system because it provides a direct passage from the driver to your ear, which results in unsurpassed clarity and extension.


Polarity Tuned Chamber

3D printed acoustic tuning for dynamic drivers. The Polarity Tuned Chamber allows optimizing the sonic performance of dynamic drivers. Deploying particular volume cavities, both in front of and behind the dynamic driver, we can pull bigger sounds from smaller drivers. This also gives the ability, in the case of hybrid designs, to specifically target the driver performance.

Beryllium / Copper MMCX Connections

The beryllium/copper MMCX connectors are more resilient against wear and tear than regular brass connectors.

obj copper


Eco-Friendly Cork Case

The cork case is handmade with eco-friendly materials for long-lasting durability while maintaining its original shape. The owner of the company wanted to create a place where people with disabilities can have a job and gain the power to stand on their own. To achieve this goal, he is working side-by-side with people who are physically disabled in a small boutique shop that he founded in Portugal.

obj corkcase


[High] Specially Customed New Single BA Driver + T.A.E.C.
[Mid] Single Updated Custom Balanced Armature Driver
[Mid + Low] Specially Tuned 10mm Dynamic Driver
Frequency Response
94dB @ 1kHz : 9.16mVrms
8.1 Ohm @ 1kHz
Total Harmonic Distortion
Less than 1%
Price: 1499$