[Pre-order] Astell&Kern AK PD20 Portable Digital Audio Player

Pre-order. Stocks will arrive mid-April 2026.

1-Year Local Warranty.

Any mention of "us," "we," "our," etc is by Astell&Kern, not AV One.

Craft Your Sound

Finding the sound that truly suits you is the first step toward the essence of music. PD20 is designed to guide you on that journey.

Our first step in this journey was to start from the very beginning. Rather than creating a successor to the PD10, we created an entirely new audio device that will redefine your musical experience.

Through Personal Sound, you can create a sound signature tailored to your hearing, then precisely refine it to your taste using the Sound Master Wheel. An intuitive control that allows even the amplifier driving mode to be changed with a single touch. Now, music is not just something you listen to. It is something you shape.

• The first DAP to support personalised sound through a hearing test
• 160-step EQ control via the Sound Master Wheel
• Triple AMP Class with real-time switching
• Class A current control with High / Mid / Low modes
• Proprietary ESA (Enhanced Signal Alignment) technology to minimise group delay
• Advanced DAR

Exceptional resolution and high-purity sound, ES9027PRO Quad-DAC

Designed with a singular focus on sound quality, PD20 adopts the ESS ES9027PRO DAC in a Quad-DAC configuration.

Four DACs operate independently to minimise inter-channel interference and deliver precise signal separation. As a result, even the finest nuances in sound are revealed with greater clarity, creating a natural, analogue-like presentation through clean, distortion-free layering.

Minimising Group Delay with Proprietary ESA (Enhanced Signal Alignment) Technology

Through its in-house developed ESA (Enhanced Signal Alignment) technology, PD20 significantly improves one of the fundamental challenges in audio reproduction—group delay. ESA precisely aligns frequency signals so they arrive more uniformly, minimising frequency distortion and enhancing clarity and cleanliness of sound.

*What is Group Delay?

Group delay refers to the difference in time it takes for each frequency to pass through an internal audio system. In simple terms, it describes a phenomenon where different frequencies within an audio signal do not arrive simultaneously, resulting in slight timing delays across frequencies.

To create the ultimate DAP unlike anything experienced before, we went beyond simply adopting the latest DACs and new specifications. We further evolved and applied TERATON ALPHA, Astell&Kern’s Ultimate Sound Solution, incorporating its advanced and innovative audio technologies.

Refined through continuous research, TERATON ALPHA represents Astell&Kern’s integrated audio engineering expertise. Through effective power noise reduction, efficient power consumption with stable amplification, and a precisely engineered audio output interface, it delivers sound that remains faithful to the original source.

More information is available on Astell&Kern’s official website.