The Astell&Kern PD20 is a reference-grade portable digital audio player (DAP) that combines advanced digital architecture with personalized sound calibration. Built upon a Quad ESS ES9027PRO DAC setup and an in-house Enhanced Signal Alignment (ESA) engine, the PD20 delivers ultra-low distortion and precise phase timing across all high-resolution audio formats, including native 32-bit/768kHz PCM and DSD512.

A major highlight of the PD20 is its Triple AMP Architecture, featuring physical hardware switches to toggle between Class A, Class AB, and Hybrid amplifier modes in real-time, complete with 3-stage current level adjustment. Designed for complete personalization, it integrates Audiodo Personal Sound calibration to tailor left/right output to your unique hearing profile, alongside a dedicated tactile Sound Master Wheel for hardware-based EQ adjustments.

KEY FEATURES & SYSTEM HIGHLIGHTS

• Quad ESS ES9027PRO DAC Array: Four independent DACs operate in a balanced configuration to eliminate inter-channel crosstalk and maximize signal separation.
• Triple AMP Architecture & Current Control: Select between Class A, Class AB, or Hybrid amp modes via physical switches, with High/Mid/Low amp current modes to drive sensitive IEMs or demanding planar headphones.
• Audiodo Hearing Calibration: Performs an automated hearing test to create a customized acoustic profile, correcting frequency imbalances for each ear.
• Sound Master Wheel EQ: Real-time hardware EQ dial provides tactile control across 5 frequency bands with 160 fine adjustment steps.
• ESA & Advanced DAR Processing: Enhanced Signal Alignment minimizes group delay, while Digital Audio Remaster upscales lower-resolution audio streams.
• Generous Built-In Storage & Expansion: Features 256GB of internal storage and supports microSD expansion up to 2TB.
• Hi-Res Wireless & Dual Outputs: Bluetooth 5.3 supporting LDAC, aptX HD, and LHDC codecs alongside 3.5mm unbalanced/optical and 4.4mm balanced output ports.

SPECIFICATIONS