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Astell & Kern AK320

Portable Hi-Res Audio Player
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Astell & Kern AK320 Details

Astell&Kern AK320 Portable MQS System: The evolution continues

  • 24-bit 192kHz Bit to Bit playback
  • DSD64/128 to PCM 24bit 176kHz playback
  • AK4490 x2 (Dual DAC)
  • USB DAC: Max 24bit 96kHz (UAC 1.0)
  • Parametric EQ with 20-band 0.1dB
  • 200 Femto Second VCXO Reference Clock
  • DLNA-based AK connect App
  • Metal Touch Sensor Home Button
  • Built-in Memory: 128GB

The primary goal of Astell & Kern has always been to deliver the original sound, and with the flagship AK380, they did just that. The company wanted even more people to experience elevated, high-resolution sound quality, so they created the AK320, which features many of the advanced technologies of the AK380 but at a more affordable price.

PEQ (Parametric EQ)
A parametric equilizer delivers detailed adjustment of the original sound, and an audio digital signal processor (DSP) was added to aid in this process.

This frees up CPU cycles previously needed for calculating graphic equalizers (GEQ) to 20-band + / - 0.1 dB to more precisely adjust the frequency and gain (dB) as well as more accurately specifying the frequency range via Q value adjustments.

Equipped with a Femto Clock to deliver true original sound
Astell&Kern implemented a voltage-controlled crystal oscillator (VCXO) high-precision clock with a reference jitter value of 200 femto seconds. Femto clocks are commonly used in high-end audio systems, and the clock is measured in high-precision femtosecond units (one quadrillionth of a second).

What is VCXO?
A CVXO, or a voltage-controlled crystal oscillator, is a type of crystal oscillation device that creates oscillation frequencies. External environmental stimuli, which in this case mean voltage inputs, influence the frequency value. Adjustments to the voltage input tunes a precise frequency value.

What is Jitter
Jitter refers to the undesired deviation in time that occurs in a periodic signal. In this case, jitter is the error that occurs in the reference clock required to perform the sampling in digital audio equipment.

By utilizing a femto clock, the AK320 is able to create a more accurate frequency value and make fine jitter corrections. As a result, the AK320 faithfully reproduces analog sound closer than ever to the original source when transmitting a digital signal as an analog signal.

AK Connect App
Astell & Kern has further enhanced DLNA functionality via the AK Connect app. Wireless networking DLNA (version 1.0) connects to a NAS or PC, and is easily controlled with a smartphone or tablet through AK Connect. Source files on a PC or NAS can be freely transferred and streamed without the hassle of turning on the computer and physically connecting with a cable.

If on the same access point (AP) network, music files on a PC or NAS can be played back DLNA

Pressure-sensitive metal capacitive touch
Like the AK380, the AK320 utilizes a metal capacitive touch interface. The pressure-sensitive metal touch home button responds to fine pressure changes so users operate the device with just a light touch on the metallic pad.

More expandable options
The AK320 offers great expandable options through its micro USB connection and balanced out ports on the bottom of the unit.

The AK320's functionality is expandable by connecting to a variety of devices. It can be connected with the Astell&Kern AMP as well as professional high-impedance headphones for high output and USB for data transfer and charging. It can also be connected to the Cradle for balanced audio functionality as well as the CD-RIPPER to conveniently rip audio CDs.

Additional Information

Name Astell & Kern AK320
Sub Title Portable Hi-Res Audio Player
Manufacturer Astell & Kern
Manufacturer Part# AK320-128GB-GM

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  • PCM: 24bit 192kHz Bit to Bit
  • DSD: DSD64/128 -> PCM 24bit 176kHz
  • DAC: AK4490 x2 (dual DAC)
  • PEQ: Support
  • Femto Clock: Support
  • USB DAC: Max 24bit 96kHz (UAC 1.0)
  • Built-in Memory: 128Gb

    What's in the Box
  • AK320 Portable Music Player
  • Leather Case
  • Warranty Card