Astell & Kern AK320 USB DAC Headphone Amp

Special Price $999.00 Regular Price $1,799.00
Out of stock

Sold Out & Discontinued

We recommend the KANN or SP1000 as a replacement.

The Astell & Kern AK320 is a Dual DAC, DSD to PCM playback designed by AK to deliver your music's original sound just as the artist intended.

Android File Transfer - Move files from Apple Mac to AK Players

Astell & Kern AK320 is a Dual DAC, DSD to PCM playback designed by AK to deliver your music's original sound just as the artist intended. The AK380 did just that so Astell & Kern wanted even more people to experience that sound with the AK320.

AK320 Features Include:

  • Dual-DAC, DSD-to-PCM Playback
  • Parametric EQ with 20bands 0.1dB
  • 200 Femto Second VCXO Reference Clock
  • Exceptional Expandability
  • DLNA-based AK Connect App and Metal Touch Sensor Home Button

Compare AK320 Series with the AK300 & AK380



24bit 192kHz Bit to Bit 24bit 192kHz Bit to Bit 32bit 384kHz Bit to Bit


DSD to PCM DSD to PCM Native DSD Playback


PCM 24bit 176kHz


PCM 24bit 176kHz

DSD 2.8MHz (DSD 64)
/ DSD 5.6MHz (DSD 128)
/ DSD 11.2MHz (DSD 256)


AK4490 x1 (Single DAC)
AK4490 x2 (Dual DAC)
AK4490 x2 (Dual DAC)


Support Support Support
Femto Clock
Support Support Support
Max 24bit 96kHz (UAC 1.0)
Max 24bit 96kHz (UAC 1.0)

Max 32bit 384kHz 
/ DSD 11.2MHz (UAC 2.0)

Built-in Memory

64GB 128GB 256GB

The AK320 was developed in response to consumer's requests for a unit that behaved and performed like the AK380, but for whom DSD (and the attendant hardware and software demands) are less critical. The AK320 plays all of your DSD source material. However, rather than having native DSD capability, AK uses the finest DSD over PCM circuitry.

24bit 192kHz bit to bit Playback

AK320 is capable of bit-to-bit playback up to 24bit, 192kHz.
32bit audio is downsampled using a sample-rate converter (SRC). In addition, DSD 64/128 can be played back via conversion to PCM.

* 32bit, 384kHz is downsampled to 24bit, 192kHz, and 32bit, 352kHz is downsampled to 24bit, 176kHz for playback.
* DSD 64/128 is converted via DSD-to-PCM to PCM 24bit, 176kHz for playback.

32bit Playback by the AK320

Astell & Kern AK320 32 bit playback

DSD-to-PCM Conversion by the AK320

AK320 dsd to pcm

PEQ (Parametric EQ)

A parametric equalizer (PEQ*1) was implemented in the AK380 to deliver 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), allowing more detailed and accurate calculations via the dedicated DSP.

The audio DSP expands the existing 10-band, ±0.5 dB graphic equalizer (GEQ*2) 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.

* The PEQ supports up to 8 kHz - 192 kHz (8/16/24-bit) formats, but DSD and 32-bit audio are not supported.

The AK320's PEQ Playback Using Audio DSP

AK320 PEQ Playback

The other Products GEQ Playback Using Audio DSP

playback GEQ other products

AK320 20-band PEQ and AK120 Ⅱ 10-band GEQ Frequency Values

AK320 Frequency values

What is Parametric Equalization (PEQ*1)?

Parametric equalization refers to the ability to increase or decrease the volume within the Q value range. A Q value is a frequency range relative to a selected frequency. The frequency range decreases when the Q value increases and vice versa.


What is Graphic Equalization (GEQ*2)?

Graphic equalization divides the audible frequency register into several registers and increases or decreases the level of each register with a volume slider to adjust the respective frequency's characteristics. The switches of the volume slider are connected like a graph to visually determine the frequency characteristics, hence the name "graphic equalizer."


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 *3.

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 VCXO, 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.

AK320 Jitter


The AK320 supports USB DAC functionality.

The AK320 can be connected to a PC or Mac via USB for use as a USB DAC that supports PCM/DSD.

When playing back music stored on a PC or Mac, the Dual-DAC is able to deliver richer audio of outstanding soundstage and resolution well beyond the limits of a built-in sound card.

* When using the AK320 as a USB DAC, its PEQ settings are not applied, and output up to 24bit, 96kHz is supported.
* DSD 64/128 is converted via DSD-to-PCM for playback.


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 via DLNA.

AK320 Connect

DMP (Digital Media Player)

Finds a list of content on a media server for selection and playback.

DMC (Digital Media Controller)

Finds a list of content on a media server and establishes a connection to a playback-capable device (renderer). By default, a DMC establishes a connection between a media server and media renderer and controls content playback-related operations.

DMS (Digital Media Server = Network Server)

Actually stores the media content to be shared. When connected to a network, the DMS transmits/distributes the media content for other devices to stream or download.

DMR (Digital Media Renderer = Network Player)

Connects to a media server via media controller for content playback.

Astell & Kern AK320 App

Pressure-sensitive Metal Capacitive Touch

The AK320 features the same metal touch interface as the AK380.

The Metal Touch functions as a home key and interfaces&nbsp with the device via pressure-sensitive touches.

AK320 pressure sensitive

(Size: 1.1 MB)
Astell&Kern AK320 Digital Audio Player

General Specifications



4” WVGA(480 x 800) Touch Screen

Supported Audio Formats

WAV, FLAC, WMA, MP3, OGG, APE(Normal, High, Fast), AAC, ALAC, AIFF, DFF, DSF

Sample rate

PCM: 8kHz~192kHz(8/16/24bits per sample)

DSD: DSD64, Stereo/DSD128, Stereo

Output Level

Unbalance 2.2Vrms/ Balance 2.3Vrms(Condition No Load)


AKM AK4490 x2(Dual DAC)


Support up to 24bit / 192kHz Bit to Bit Decoding


USB Micro-B input(for charging & data transfer(PC & MAC)) / Connection Mode: MTP(Media Device)


PHONES(3.5mm) /Optical Out(3.5mm) / Balanced Out(2.5mm, only 4-pole supported)


802.11 b/g/n(2.4GHz)


V4.0(A2DP, AVRCP, aptX)


2.95”(75.15mm)[W] x 4.42”(112.4mm)[H] x 0.64”(16.45mm)[D]



Body Material


Body Color

Gun Metal

Feature Enhancements

Firmware upgrades supported(OTA)t

Audio Performance


Frequency Response

±0.053dB(Condition: 20Hz~20kHz) Unbalance & Balance

±0.56dB(Condition: 10Hz~70kHz) Unbalance /±0.55dB(Condition: 10Hz~70kHz) Balance

Signal to Noise Ratio

116dB @ 1kHz, Unbalance/117dB @ 1kHz, Balance


130dB @ 1kHz, Unbalance/135dB @ 1kHz, Balance


0.0008% @ 1kHz, Unbalance/0.0007% @ 1kHz, Balance


0.0007% 800Hz 10kHz(4:1) Unbalance/0.0006% 800Hz 10kHz(4:1) Balance

Output Impedance

Balanced out 2.5mm(1ohm) /PHONES 3.5mm(2ohm)

Clock Source


Clock Jitter

Reference Clock Jitter 200 Femto Seconds



Built-in Memory


External Memory

microSD(Max. 128GB) x1




3,400mAh 3.7V Li-Polymer Battery



Supported OS

Windows XP, Windows 7, 8,10(32/64bit), MAC OS X 10.7. and up
Device Components:

AK320 Device, Leather Case, Screw Cap, Micro 5pin USB Cable, Quick Start Guide, Warranty Card,
microSD Card Slot Cover x2, Protective Film(Front, Back)

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