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AK320
Astell&Kern Discontinued

AK320

The AK320 is a portable digital audio player with dual AKM AK4490 DACs, a 4-inch touchscreen and an aluminum body. It suits listeners who want a stand-alone player with balanced output, parametric EQ and USB DAC use.

  • Dual AKM AK4490 DACs
  • 24bit/192kHz bit-to-bit PCM; DSD64/128 converted to PCM
  • 20-band parametric EQ, 0.01dB steps
  • 128GB built-in memory plus microSD up to 256GB
  • 3.5mm, 2.5mm balanced and optical outputs
  • USB DAC mode up to 24bit/96kHz
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Description

The AK320 is a portable music player built around two AKM AK4490 DAC chips. It decodes PCM up to 24-bit/192kHz bit-to-bit. 32-bit material is sample-rate converted down, and DSD64/128 files are converted to 24-bit/176kHz PCM for playback. It has 128GB of built-in memory plus a microSD slot (up to 256GB), and plays common formats including WAV, FLAC, ALAC, AIFF, DSF, DFF, MP3, AAC and OGG.

Sound-shaping tools include a 20-band parametric EQ with 0.01dB steps, handled by a dedicated audio DSP, and a 200 femtosecond VCXO reference clock. The PEQ works with 8kHz–192kHz content at 8/16/24-bit, but not with DSD or 32-bit audio. A pressure-sensitive metal touch home button sits below the 4-inch WVGA screen, and the AK Connect app (phone and tablet versions) is available for iOS and Android.

Outputs are a 3.5mm headphone jack, a 2.5mm 4-pole balanced output and a 3.5mm optical output. A micro-USB port handles charging and data transfer, and also lets the player act as a USB DAC for a PC or Mac, limited to 24-bit/96kHz without PEQ. The balanced port and micro-USB connect to the maker's AMP, Cradle and CD-RIPPER accessories. Wi-Fi 802.11 b/g/n and OTA firmware updates are supported.

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Specifications

Brand
Astell&Kern
Model
AK320
Category
Hi-fi and home audio › Players

General

Model
AK320
Body Color
Gun Metal
Body Material
Aluminum
Display
4inch WVGA (480 x 800) Touchscreen
Firmware
Firmware upgrades supported (OTA)

Audio

DAC
AKM AK4490 x2 (Dual DAC)
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
Decoding
Support up to 24bit / 192kHz Bit to Bit Decoding
Output Level
Unbalance 2.2Vrms / Balance 2.3Vrms (Condition No Load)
Reference Clock Jitter
200 Femto Seconds
Clock Jitter
30ps(Typ)

Audio Performance

Frequency Response
±0.053dB (Condition: 20Hz~20kHz) Unbalance & Balance
Signal to Noise Ratio
116dB @ 1kHz, Unbalance / 117dB @ 1kHz, Balance
Crosstalk
130dB @ 1kHz, Unbalance / 135dB @ 1kHz, Balance
THD+N
0.0008% @ 1kHz, Unbalance / 0.0007% @ 1kHz, Balance
IMD SMPTE
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)

Inputs

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

Outputs

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

Connectivity

Wi-Fi
802.11 b/g/n (2.4GHz)
USB DAC
Max 24bit 96kHz (UAC 1.0)

Storage

Built-in Memory
128GB [NAND]
External Memory
microSD (Max 256GB) x1

Power

Battery
3,400mAh 3.7V Li-Polymer Battery

Physical

Dimensions
2.95 ”(75.15 mm) [W] x 4.42 ”(112.4 mm) [H] x 0.64 ”(16.45 mm) [D]
Weight
7.65 oz (217 g)

Software

Supported OS
Windows XP, Windows 7,8,10 (32/64bit), MAC OS X 10.7 and up

Data: astellnkern.com; photos: Astell&Kern product page · updated 2026-10-12 · Found a mistake? Write to us