Astell&Kern's Latest IEM Collaboration - the SOLARIS X

Astell&Kern Announces New Collaboration with Campfire Audio
The Limited-Edition SOLARIS X Marks the First Collaboration Between the Two Audio Specialist Market Leaders



Astell&Kern, a global leader in high-resolution audio playback devices and accessories, announces a new collaboration with Campfire Audio to produce in-ear monitors (IEMs) under the Astell&Kern brand.  The limited-edition Solaris X is the first product to be released under the new collaboration.  The SOLARIS X will be sold exclusively by Astell&Kern dealers worldwide for $1,499 in July 2021 and will be available in limited quantities. 

The SOLARIS X is based on the popular Campfire Solaris 2020 IEM, but features a new custom Balanced Armature (BA) driver for high frequency response that was designed specifically for the AK SOLARIS X.  This driver is smaller in size than the ones used in existing Solaris models.  The new custom BA driver produces a more neutral response in comparison to the current Campfire Audio Solaris 2020 model.  Coupled with Campfire’s patented tuned acoustic expansion chamber (T.A.E.C.) technology, the new driver offers smooth and extended high frequencies.

A Second 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 frequencies.

Each earphone integrates a 3D Printed Acoustic Chamber which enable the drivers to deliver the highest audio quality possible, creating a natural and accurate sound.

Beryllium/copper MMCX connectors on the IEM are more resilient against wear and tear than regular brass connectors.

The 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 a practical to use every day.  A matching 2.5mm to 3.5mm adapter is provided for use with a variety of playback devices. 

Accessories bundled with the AK SOLARIS X include an eco-friendly cork case that is hand-made in Portugal, various sized ear tips to provide the perfect seal, earphone protective sleeves and a cleaning tool. 

The AK SOLARIS X is hand-assembled by Campfire Audio in Portland, Oregon, USA by skilled craftsmen, ensuring each individual earphone is manufactured to the highest quality standards.

The AK SOLARIS X will be available in limited quantities from authorized Astell&Kern dealers in the US/Canada in July 2021 for $1,499.

Please visit the AK SOLARIS product page for more information and to pre-order. 

About Astell&Kern

Astell&Kern is a high-end luxury brand specializing in high-resolution audio products and accessories launched in October 2012 by Dreamus. Astell&Kern’s goal is to provide customers with the ultimate digital music source that delivers Mastering Quality Sound or MQS.  Astell&Kern players support high-resolution digital audio playback up to 32-bit/768kHz PCM and DSD512.  The brand mission is to provide natural and original sound without distortion or compression so that listeners can enjoy music the way the artist, producers and recording engineers intended it to be heard. Astell&Kern products offer the exact presence with every detail you couldn’t have noticed from other music systems, The Way Music is Meant to be Heard!

For more information about Astell&Kern, please visit or the Astell&Kern Facebook page and Twitter feed.


About Campfire Audio

Campfire Audio springs from a passionate focus on refined audio reproduction.  Each model in our earphone line is designed and assembled by hand in our Portland, Oregon workshop; our earphones are second to none in performance and finish. With a small team of highly skilled and dedicated craftspeople, we continuously experiment with materials and techniques to create something unique and special for the people who care most about it.

To learn more about Campfire Audio, please visit