Premium Bluetooth for Hi-Fi Sound

AK HB1 is equipped with Qualcomm's CSR8675 Bluetooth chipset, which supports the transmission of high-resolution audio sources, ensuring a stable connection.

From LDAC, supporting 24 bit/96 kHz, to the aptX™ HD codec offering stable 24 bit/48 kHz support, AK HB1 accommodates an extensive selection of codecs, including the most commonly used AAC and SBC. This comprehensive codec support guarantees smooth wireless playback of high-resolution streaming audio from both smartphones and PCs.

Furthermore, AK HB1 features Bluetooth multi-point capability, allowing connection 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 PC while concurrently receiving notifications and calls on your smartphone.

Hi-Resolution Sound Unleashed by USB DAC

AK HB1 goes beyond simple Bluetooth playback, delivering outstanding, full high-resolution sound via USB DAC connection to PCs, smartphones, tablets, and more.

Supporting Native DSD256 and 32 bit/384 kHz playback, AK HB1 ensures compatibility with a diverse range of high-quality audio sources, providing Astell&Kern's signature premium sound quality.

Additionally, equipped with a renderer function that supports MQA 8X, AK HB1 enables MQA playback without the need for external DACs or playback devices. By simply connecting 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.

* To use AK HB1 as an H/W MQA renderer, a compatible S/W core decoder capable of unfolding MQA is required.

Precision DAC and AMP Design for Hi-Fi Sound

AK HB1 incorporates ESS’s ES9281AC PRO DAC for exceptional noise control and unparalleled ultra-high-quality Hi-Fi sound performance.

Adding to this, AK HB1 introduces an exclusive AMP circuitry that supersedes the standard built-in DAC AMP.

Its AMP enables a commanding 4 Vrms output (in Balanced connection) and dual connectivity options — 3.5 mm unbalanced and 4.4 mm balanced, catering to a wide range of IEMs and headphones.

While maintaining a compact form factor of 33 x 68.4 x 16.5 mm, we used micro resistors and capacitor parts to achieve a small footprint without compromising performance. Carefully selected ultra-small tantalum capacitors, which are used in AK player products to create a stable system and audio performance by controlling the power fluctuations, are also included to create an optimal audio circuit design. In addition, the output and audio performance are enhanced with Astell&Kern's unique power management technology to minimize current consumption in respect of the connected device.

Specifications

• Color
•   Black
• Crosstalk
• -112dB @ 1kHz, Unbalanced │ -112dB @ 1kHz, Balanced
• Sample Rate
• PCM : 8kHz ~ 384kHz (8/16/24/32bits per Sample), DSD Native: DSD64(1bit 2.8MHz), Stereo / DSD128(1bit 5.6MHz), Stereo / DSD256(1bit 11.2MHz), Stereo
• Total Harmonic Distortion (THD)
• 0.0005% @ 1kHz, Unbalanced │ 0.0005% @ 1kHz, Balanced
• DAC
• ESS ES9281AC PRO
• Signal to noise ratio
• 117dB @ 1kHz, Unbalanced │ 118dB @ 1kHz, Balanced
• Output
• 3.5mm (Supports CTIA standard 4-pole earphones/headphones), 4.4mm (Only 5-pole supported)
• Bluetooth
• Chipset : Qualcomm CSR8675, Version : 5.0, Codec : LDAC, aptX™HD, aptX™, AAC, SBC, Profile : A2DP, AVRCP, HFP
• Analog Outputs
• Unbalanced 2Vrms / Balanced 4Vrms (Condition No Load)
• Output Impedance
• Unbalanced Out 3.5mm (2.5ohm) │ Balanced Out 4.4mm (2ohm)
• Material
• Polycarbonate (Body) / Aluminum (Volume Wheel)
• Input
• USB Type-C (Supports UAC 1.0 and UAC 2.0)
• Battery Life
• 600mAh 3.8V Li-Polymer, about 6hours (Standard : AAC)
• Battery Life
• about 1.5hours
• Connectivity Outputs
• 3.5mm (Supports CTIA standard 4-pole earphones/headphones), 4.4mm (Only 5-pole supported)
• Frequency Response
• ±0.135dB (Condition : 20Hz~20kHz) Unbalanced │ ±0.136dB (Condition : 20Hz~20kHz) Balanced
• Weight
• 0.04 kg
• Height
• 39.8 mm
• Width
• 68.4 mm
• Length
• 16.5 mm

• Supplier Code : ANK-00028
• Manufacturer : Astell&Kern