Astell & Kern / PD20 Silver

＜＜April 2026 New Product！＞＞The PD20 is a high-resolution audio player designed with professional use in mind, featuring an ES9027PRO Quad DAC, triple amplifier class switching, 160-step EQ control via Sound Master Hall, and support for personalized sound based on auditory measurements.

■First Personal Sound compatible audio player designed for professional use
■Equipped with ESS ES9027PRO Quad DAC
■Proprietary ESA technology to minimize group delay
■Triple amplifier architecture with selectable Class A/AB/Hybrid amplifier classes
■Class A Current function (when using Class A/Hybrid amplifier) that allows adjustment of the amplifier's operating current in 3 stages
■Personal Sound function developed in collaboration with Audiodo that adjusts to the optimal sound characteristics based on auditory measurements
■Audiodo Audiosphere function that extends 2ch audio into a virtual 3D sound field
■Audiodo equalizer function that allows intuitive control of Bass/Mid/Treble
■Sound Master Wheel with 160 steps of adjustment that seamlessly works with the Audiodo equalizer
■Advanced DAR function, an upsampling technology using VSE
■7 types of DAC filters and crossfeed function

■Model name: PD20
■Color: Silver
■Body material: Aluminum
■Display: 6 1080×2160 inch (1080×2160) Touchscreen
■Dimensions: (W×H×D) 77.5mm × 155.7mm × 17.3mm
■Weight: Approx. 313g
■Firmware Update: OTA
■Operating Temperature: 0°C ~ +40°C
■Supported OS: Windows 10 (32/64bit) 11 (64bit) / MAC OS X 10.7
■Internal Memory: 256GB [NAND] *Including system area
■External Memory Support: microSD slot × 1 (up to 2TB)
■Wi-Fi: 802.11 a/b/g/n/ac (2.4/5GHz)
■Bluetooth: V5.3 (A2DP, AVRCP / SBC, AAC, Qualcomm™ aptX™ HD, LDAC, LHDC)
■Supported File Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF
■CPU: Octa-core
■DAC: ESS ES9027PRO x 4 (Quad DAC)
■Supported Sampling Rates:
・PCM Max: 768KHz (16/24/32bit)
・DSD Max: DSD512 (22.4MHz/1bit) Stereo
■Input: USB Type-C (Charging & Data Transfer)
■Output:
・3.5mm 3-pole unbalanced output (also functions as optical digital output)
・4.4mm 5-pole balanced output (5-pole GND connection)
■Output Level: Unbalanced 5Vrms / Balanced 10Vrms (no load)
■Output Impedance: Unbalanced 3.5mm (0.7Ω) / Balanced 4.4mm (1.7Ω)
■Frequency Response (*):
・±0.005dB (20Hz~20kHz) Unbalanced / ±0.010dB (20Hz~20kHz) Balanced
- ±0.020dB (20Hz~70kHz) Unbalanced / ±0.020dB (20Hz~70kHz) Balanced
■S/N Ratio (*): 124dB @ 1kHz, Unbalanced / 127dB @ 1kHz, Balanced
■Crosstalk (*): -133dB @ 1kHz, Unbalanced / -140dB @ 1kHz, Balanced
■THD+N (*): 0.0003% @ 1kHz, Unbalanced / 0.0004% @ 1kHz, Balanced
■IMD (*): 0.0006% 800Hz 10kHz (4:1) Unbalanced / 0.0006% 800Hz 10kHz (4:1) Balanced
■Clock Jitter: 25ps (Typ)
■Reference Clock Jitter: 250 fs
■Battery: 5,770mAh 3.8V Lithium Polymer
■Charging Time: Approx. 4 hours (PD 3.0 charging)
■Playback Time: Approx. 14 hours (Normal/Class AB, FLAC, 44.1KHz/16bit, Vol.50, LCD off, unbalanced output)
■Accessories: Earphones for hearing test, USB Type-C to Type-C cable, screen protector, microSD card slot cover
■Country of Origin: South Korea
■Manufacturer's Warranty: Main unit 1 year / Accessories 90 days