Talk about versatility. Astell&Kern’s HB1 is a portable DAC/Amp with wireless Bluetooth connectivity that supports 24-bit LDAC and aptX HD as well as native DSD256 and 32-bit/384 kHz PCM via USB.
The $259 accessory ultimately aims to improve the sound quality coming out of your smartphone, tablet or laptop, and gaming console — whether connected wired or wirelessly.
AK HB1 is equipped with Qualcomm’s CSR8675 Bluetooth chipset, which supports the transmission of high-resolution audio sources. Meanwhile, it also supports AAC and SBC codecs for compatibility with any Bluetooth device.
Bluetooth multi-point capability allows connection of the AK HB1 with up to two devices simultaneously. This feature allows you to effortlessly switch connections between various mobile devices, enabling scenarios like enjoying music from a tablet or PC while concurrently receiving notifications and calls on your smartphone.
Additionally, equipped with a renderer function that supports MQA 8X, the AK HB1 enables MQA playback without the need for external DACs or playback devices. By simply connecting the AK HB1 via cable to compatible devices, which support MQA unfolding, you can enjoy MQA audio playback through network-enabled apps and streaming services from anywhere.
AK HB1 incorporates ESS’s ES9281AC PRO DAC for exceptional noise control and unparalleled ultra-high-quality Hi-Fi sound performance combined with an exclusive Astell&Kern-designed AMP circuitry that supersedes standard built-in DAC AMPs found in competing products.
This AMP circuitry enables a commanding 4 Vrms output (balanced connection) and dual connectivity options — 3.5 mm unbalanced and 4.4 mm balanced, allowing compatibility with a wide range of IEMs and headphones. A dedicated volume wheel allows users to adjust the playback volume from the HB1.
Astell&Kern used micro resistors and capacitor parts to achieve a small footprint form factor of 33 x 68.4 x 16.5mm without compromising performance. Carefully selected ultra-small tantalum capacitors, which are used in AK player products to create stable system and audio performance by controlling the power fluctuations, are also used in the HB1 to create an optimal audio circuit design.
Output and audio performance are enhanced with Astell&Kern’s unique power management technology to minimize current consumption of the connected device.
Features
Easy and Convenient USB Plug & Play
AK HB1 simplifies the transition between Bluetooth and USB cable connections by supporting USB Plug & Play functionality. Connect AK HB1 to your PC or smart device using a USB cable to enjoy high-resolution sound while simultaneously controlling various settings and features through the app on your Bluetooth-connected smartphone. With BT Priority Mode enabled, the AK HB1 seamlessly switches to Bluetooth mode, whenever a Bluetooth signal is received while using the USB DAC function.
UAC 1.0 & 2.0 Support for Gaming
While modern smartphones, tablets, and PCs support UAC 2.0 connections, many gaming devices still exclusively support UAC 1.0 connections. The AK HB1 ensures compatibility by supporting both UAC 2.0 and UAC 1.0 connections for cross-platform quality sound experiences.
Now you can connect the AK HB1 to your gaming device such as PlayStation 5 or Nintendo Switch to enjoy low latency and enhanced audiophile-quality sound for an immersive gaming experience.
Car Mode
Activate AK HB1’s dedicated Car Mode to enjoy the same high-quality, audiophile DAC/AMP sound in your car. Simply connect the AK HB1 to your vehicle’s AUX port, and its power automatically turns on/off based on your vehicle’s ignition, allowing you to enjoy audio from paired devices.
Crystal-Clear Voice Calls with built-in mics
AK HB1 ensures crystal-clear voice quality and stability thanks to Knowles’s high-quality MEMS microphone technology and Qualcomm’s cVc Generation 8.0 call solution with Clear Voice Capture technology, which suppresses ambient noise while delivering clear vocals to the recipient.
The AK HB1 also incorporates a 4-pole in-line MIC, enabling voice calls via wired earphones. With the HB1, you can experience enhanced call quality alongside AK HB1’s exceptional Hi-Fi sound.
Smart Charging System
Astell&Kern’s AK HB1 automatically recognizes what type of device is connected via a USB cable and streamlining the charging process without requiring additional setting adjustments. Charging mode can also be turned on/off to allow simultaneous playback and device charging, preventing battery depletion during playback.
Dual Noise Shielded Cable
To ensure optimal usability across both Android and iOS devices without the need for additional adapters, the AK HB1 includes interchangeable cables that support USB Type-C and Lightning connections.
The AK HB1 features a dual shielded cable to minimize noise and deliver a more vivid, original sound. The copper core wire is coated with tin to prevent corrosion and strengthen tensile force for enhanced durability.
Additionally, the entire cable is wrapped in an aluminum film to block noise with an extra layer of shielding around the power cable to further minimize noise, the biggest issue in audio, then the tin-coated copper wire is woven to minimize noise interference to sound.
Finished with a fabric jacket on top of the PTE jacket, the cable features enhanced durability and usability with perfect aesthetic appeal.
Dedicated Control App
The AK Control companion app, available for iOS and Android devices, allows users to customize settings for the AK HB1.
The AK HB1 embodies Astell&Kern’s design philosophy with inspiration from the architectural masterpiece “Church of Light” by Tadao Ando, known for its interplay of light and shadow.
Embodying the essence of robustness and simplicity, much like concrete, the device showcases a sleek form that cleverly integrates buttons and earphone connections within the gaps between its front and back housings. The use of silver coloring between the front and rear surfaces creates an illusion of light gracefully flowing between the two facades.
Intuitively designed with a comfortable grip, the size and placement of the wheel ensure effortless volume control. The wheel features a combination of aluminum and rubber materials for improved grip and accuracy, ensuring easy and accurate control.
The AK HB1 will be certified Roon Tested pending completion of the testing and certification process by Roon Labs.
Price & Availability
The HB1 Bluetooth DAC/Amp will be available in November 2023 at authorized Astell&Kern worldwide for $259 at Audio46.
