Compact in Form, Infinite in Sound
Engineered for effortless portability, it delivers music with total freedom and comfort—without ever compromising on performance or sound quality.

Designed to fit comfortably in one hand, the PD5 combines a compact form factor with all-day battery life. Going far beyond the physical limits of its size, it delivers Astell&Kern’s signature deep, detailed, and rich sound.

Achieving the perfect harmony between portability and high performance, the PD5 brings the ultimate audio experience into your everyday life.
 
Octa-DAC (Switchable Quad / Octa DAC)
Up to 28 Hours of Continuous Playback
EnviroTune: Analyzes ambient noise to automatically deliver optimal sound
Compact Design that fits perfectly in one hand
 
Octa-DAC, Uncompromised Sound
Engineered with an Octa-DAC architecture, it delivers extraordinary audio fidelity—without sacrificing power or precision.

Powered by eight CS43198 DACs, the PD5 achieves an expansive dynamic range with exceptional channel separation. Going far beyond conventional signal processing, it unveils the purest sound, capturing even the most subtle musical nuances.

Unlocking up to 8Vrms of output to effortlessly drive any headphone, the PD5 brings Astell&Kern’s true signature sound into complete perfection.
 
Dual Drive Mode: Tailored to Every Listening Environment
Dual Drive Mode allows users to select the optimal DAC configuration for any listening environment or preference. Discover the ideal balance between performance and power efficiency.
 
Quad-DAC
Astell&Kern’s signature sound with a natural and smooth sonic character, optimized for efficient power consumption and extended playback time.
Balanced Sound (Natural & smooth)
Efficient Power
6Vrms
28 Hours Playback
 
Octa-DAC
Delivers extraordinary audio fidelity with an expansive dynamic range and exceptional channel separation.
Ultimate Sound (Greater Detail)
Maximum Performance
8Vrms
15 Hours Playback
 
Specifications
General Specifications
Model:
PD5
Body Color:
Silver
Body Material:
Aluminum
Display:
4.1inch 720 x 1280 Touch screen
Supported Audio Formats:
WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF
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
Output Level:
[Quad] Unbalanced 3Vrms │ Balanced 6Vrms (Condition No Load)
[Octa] Unbalanced 4Vrms │ Balanced 8Vrms (Condition No Load)
CPU:
Octa-Core
DAC:
Cirrus Logic CS43198 x8 (Octa-DAC)
Decoding:
Support up to 32bit / 384kHz Bit to Bit playback
Input:
USB Type-C input (for Charging & PC & MAC)
Outputs:
Unbalanced Out (3.5mm), Balanced Out (4.4m, only 5-pole supported)
Wi-Fi:
802.11 a/b/g/n/ac (2.4/5GHz)
Bluetooth:
V5.3 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC, LHDC, SBC, AAC)
Dimensions:
2.74” (69.7mm)[W] x 4.71” (119.7mm)[H] x 0.63” (16.1mm)[D]
Weight:
about 6.98oz (198g)
Feature Enhancements:
Firmware upgrade supported (OTA)
Operating Temperature:
0℃ ~ + 40℃ (32℉~ 104℉)
 
Audio Specifications
Frequency Response:
±0.011dB (Condition : 20Hz~20kHz) Unbalanced │ ±0.011dB (Condition : 20Hz~20kHz) Balanced:
±0.130dB (Condition : 20Hz~70kHz) Unbalanced │ ±0.143dB (Condition : 20Hz~70kHz) Balanced
S/N:
125dB @ 1kHz, Unbalanced │ 129dB @ 1kHz, Balanced
Crosstalk:
-145dB @ 1kHz, Unbalanced │ -147dB @ 1kHz, Balanced
THD+N:
0.0006% @ 1kHz, Unbalanced │ 0.0006% @ 1kHz, Balanced
IMD SMPTE:
0.0003% 800Hz 10kHz (4:1) Unbalanced │0.0001% 800Hz 10kHz (4:1) Balanced
Output Impedance:
Unbalanced Out 3.5mm (0.6ohm) │ Balanced Out 4.4mm(1.2ohm)
 
Clock Source
Clock Jitter:
25pS (Typ)
Reference Clock Jitter:
250 Femto Seconds
 
Storage Capacity
Built-in Memory:
64GB [NAND]
External Memory:
microSD x1 (Max. 1.5TB)
 
Battery
Capacity:
4,000mAh 3.8V Li-Polymer
Charge Time:
about 2.5 hours (PD3.0 Charging)
Playback Time:
about 28 hours (Standard : FLAC, 16bit, 44.1kHz, Vol.50, Quad-DAC, LCD Off)
 
Supported OS:
Windows 8,10,11(32/64bit) MAC OS X 10.7