Studio-grade audio in the palm of your hand
The Astell&Kern AK HC4 is a next-generation portable USB DAC/amplifier , designed for those who want the highest sound quality even on the go. Based on a fully balanced audio architecture and the renowned ESS ES9039Q2M converter , it offers precise, detailed and incredibly natural reproduction.
Designed for universal compatibility with smartphones, tablets, and computers, the AK HC4 features a compact and refined anodized aluminum design , with elegant lines and a signature Astell&Kern aesthetic. The USB-C interface provides a stable, low-latency connection, while the new Dual Output system with 4.4mm balanced and 3.5mm unbalanced outputs allows you to drive any type of headphones or IEMs with surprising dynamics and precision.
Each component has been selected to minimize distortion and deliver authentic sound, ensuring the transparency and spatiality of high-end equipment , while maintaining pocket-sized dimensions. The AK HC4 transforms any mobile device into a true high-resolution audio source , capable of making the most of every piece of music.
ESS Sabre technology and balanced power for perfect listening
Inside the AK HC4 is a next-generation ESS ES9039Q2M DAC , which ensures ultra-precise signal processing and playback up to 32-bit/384kHz with native DSD256 support . The circuitry is fully shielded to eliminate electrical interference from smartphones or PCs, while USB isolation technology reduces digital noise for clean, stable playback.
The device offers an output power of 3 Vrms (balanced) and 2 Vrms (unbalanced) , enough to drive even medium-high impedance headphones. The internal amplification has been optimized to ensure deep bass, natural mids and crystal-clear highs , without losing detail.
The AK HC4 supports major audio platforms, including Android, iOS, Windows, and macOS , with interchangeable Lightning and USB-C cables included in the box. It is also compatible with popular Hi-Res streaming services such as Tidal, Qobuz, Apple Music, and Amazon Music HD .
Weighing just 36 grams , the AK HC4 is the ideal accessory for audiophiles looking for a professional-quality portable DAC , combining studio-grade performance and extreme portability in a minimal, refined design.
Technical features
| Characteristic
|
Detail |
| Model
|
Astell&Kern AK HC4 |
| Device type
|
Portable USB DAC/Headphone Amplifier |
| DAC
|
ESS ES9039Q2M |
| Audio architecture
|
2-channel balanced |
| Sampling rate
|
PCM up to 32-bit/384kHz, native DSD up to DSD256 |
| Audio outputs
|
Balanced 4.4 mm / Unbalanced 3.5 mm |
| Output power
|
3 Vrms (balanced) / 2 Vrms (unbalanced) |
| Signal-to-noise ratio (SNR)
|
122 dB (balanced) / 118 dB (unbalanced) |
| THD+N
|
0.0004% (balanced) / 0.0005% (unbalanced) |
| Compatibility
|
Android, iOS, Windows, macOS |
| Connectors
|
USB-C and Lightning (both included) |
| Chassis material
|
High quality anodized aluminum |
| Dimensions (W×H×D)
|
29 × 64 × 14 mm |
| Weight
|
36 g |
| Available color
|
Dark Silver |
| Accessories included |
USB-C cable, Lightning cable, Quick Start Guide |
| Compatible software
|
Third-party Astell&Kern App / Hi-Res Player |
| Diet
|
Via host device (no built-in battery) |