Astell&Kern AK UW100MKII Wireless Earphones

Unprecedented Wireless Hi-Fi Sound Quality

Introducing the AK UW100MKII, Astell&Kern's premium True Wireless Earphones, epitomizing our commitment to authentic sound. Equipped with a rare 32-bit DAC and full-range Balanced Armature driver, these earphones deliver impeccable Hi-Fi sound wirelessly.

Enhanced with best-in-class Passive Noise Isolation and aptX™ Adaptive, they ensure superior audio quality. The internal circuit design has been optimized for reduced noise and stable connectivity, surpassing its predecessor.

The BA driver's position and acoustic chamber have been fine-tuned for extended playback, offering up to 9.5 hours of continuous use and a total of 29 hours. Experience the pinnacle of True Wireless Sound with the AK UW100MKII, designed for ultimate convenience and unparalleled audio excellence.

Advances for more complete wireless sound

Astell&Kern's long-standing, fundamental principle is the reproduction of sound as true to the original source as possible.

The AK UW100MKII, a true wireless earphone, based on our proprietary audio technology,provides uncompromising wireless Hi-Fi sound with no cables required.

A rarity for True Wireless Stereo (TWS*), the AK UW100MKII has a separate embedded high-performance 32-bit DAC as well as a Balanced Armature driver for accurately reproducing sound, allowing the delivery of precise,
high-quality audio with no loss of detail.

aptX-Adaptive audio codec support for exceptional audio quality is the final flourish,
ensuring the AK UW100MKII is ready for wireless Hi-Fi sound.

Combining all these features with ergonomic design and best-in-class Passive Noise Isolation (PNI), the AK UW100MKII takes your listening experience to a dimension where only you and the artist exist.

A New Design for Enhanced Perfection

Astell&Kern has further improved on the highly regarded TWS design of the AK UW100 to provide an even more perfect solution. AK UW100MKII offers the ultimate Hi-Fi sound—the pinnacle of Astell&Kern's technology and expertise.

The position of the BA driver has been moved towards the inside of the ear to better deliver the finer audio details more directly, and the acoustic chamber structure and mesh size have been re-designed multiple times in accordance with the new BA driver position to deliver the optimal sound output.
The new design took numerous attempts to minimize sound diffusion to provide a more delicate and dynamic performance and a richer high-frequency expression.

AK UW100MKII are a completely wireless earphones with unrivaled 32-bit DAC technology, and the AMP and circuit technology of Astell&Kern enables separation of the digital parts and analog circuits of the wireless earphone. This new design allows for further reduced noise than the previous model, offering clearer sounds with higher separation levels.

The Best Choice for Pure Sound

AK UW100, the previous model, is equipped with highest-level PNI (Passive Noise Isolation), and has been recognized as a true Hi-Fi TWS that fundamentally eliminates noise that may be caused by ANC and sound distortions, together with its outstanding noise-canceling performance. The AK UW100MKII allows users to enjoy complete musical immersion with its excellent sound technology and highest-level PNI technology.

ANC is not essential to achieve both reduced ambient noise and increased musical focus. When combined with the thoroughly tried-and-tested ergonomic design of the AK UW100MKII, PNI is sufficient to reduce noise physically.

Notably, AK UW100MKII’s noise cancelling capability is comparable to that of ANC, even for low frequencies. Another significant feature is that sound quality is retained, since noise is attenuated by the structure of the earbuds rather than by software. Developed with the help of countless simulations, the AK UW100MKII's best-in-class PNI capability allows you to escape annoying ambient noise and to immerse yourself in an experience where only you and the artist exist.

Continue the Joy of Music

We completely redesigned the power system to increase the playback time significantly, which is one of the important performance factors in TWS, while not compromising on the most important sound quality. Through new internal design and current optimization, we were able to maintain the earbud size while dramatically reducing the cradle size and significantly increasing the playback time.
Now, you can enjoy the AK UW100MKII all day without worrying about recharging, with AK UW100MKII.

Approximately 9.5hours of continuous playback, and up to 29 hours of total playback, never miss a beat with the AK UW100MKII.

Alongside the convenience of wireless charging, AK UW100MKII also supports fast charging, so you can charge for 10 minutes to play for an hour.

Premium Bluetooth, Ideal for Hi-Fi Sound Quality

AK UW100MKII features powerful wireless performance enabled by Premium Tier QCC5141, support for aptX™ Adaptive, Qualcomm's next-generation high-quality codec for wireless 24-bit sound quality and Bluetooth 5.2 support, for better connectivity than previous models.

In particular, through aptX™ Adaptive support, latency — the downside of Bluetooth audio — has been significantly improved. It also provides a feature that adjusts the bit rate according to the content or wireless environment, and supports 24 bit through a bit rate of up to 420 kbps.

In addition, Qualcomm True Wireless Stereo Plus* mode minimizes transmission delay by transmitting independent signals to each earbud. We hope you’ll enjoy the AK UW100MKII’s benefits of premium Bluetooth technology combined with next-gen high-quality wireless codecs.

Multi-Point and Multi-Pairing Support

AK UW100MKII supports Multi-Pairing and Multi-Point functions.
Pair your earbuds on multiple mobile devices at the same time. Not only can you easily switch connections to another mobile device, but you can also listen to songs played on your tablet PC while actively allowing phone notifications and calls from your smartphone.

*The Multi-Point function supports a connection of up to two devices.

Google Fast Pair. Make Pairing easier and faster

The AK UW100MKII supports Google's Fast Pair Service, allowing for easier and faster connection with Android devices. Fast Pair Service utilizes Bluetooth Low Energy technology to automatically recognize and pair devices.

By simply opening the cradle of the product near an Android device, it enters pairing mode, eliminating the hassle of opening Bluetooth settings and providing a simple and convenient way to pair the device.

Easy, Full-Touch Control

Precise full-touch control is enabled so you can simply tap to switch between functions: Play Music, answer calls, adjust the ambient level and volume, and more.

Voice Assistant Support

Tap the left earbud three times to activate your smartphone's Voice Assistant function. Control music playback, make phone calls and more powerful smartphone functions with your voice.

*The supported Voice Assistant function may vary depending on the specifications of each mobile device manufacturer.

Easy Configuration with Our Proprietary App

Install the exclusive app to use various functions and enjoy easy setup.

The AK TWS app is equipped with various newly developed user functions for the AK UW100MKII.

Users now can conveniently control basic battery information, User EQ setup, touch-key arrangement, ambient stage control, etc.

DESIGN

The AK UW100MKII stands as Astell&Kern's inaugural Hi-Fi True Wireless earphones, delivering pristine, distortion-free sound, preserving the essence of music wirelessly.

Just as Astell means "star" in Greek and Kern means "center" in German, so too Astell&Kern symbolizes the company’s core identity of representing the center of music. This identity also shapes the design philosophy of the AK UW100MKII : the beauty of music is symbolized by a single star (Astell), embodying the twinkling and scattering of starlight.

These earbuds are ergonomically designed to fit snugly, transitioning from a pentagon to a circle, mirroring how sound is gathered and refined for crystal-clear reproduction. The cradle, housing two pentagon-shaped earbuds, symbolizes the interplay of light and shade, upholding Astell&Kern's identity. The AK UW100MKII refines this design, enhancing portability while staying true to the brand's essence.