Digital Audio Player AK240
Digital Audio Player AK240 1Digital Audio Player AK240 2Digital Audio Player AK240 3

Digital Audio Player Astell&Kern AK240 Dual-DAC


Astell&Kern is the ultimate portable high-fidelity audio system capable of studio Mastering Quality Sound (MQS). Mastering Quality Sound (MQS) is an acronym of collective lossless & high-resolution audio source formats, typically in 24-bit/44 to 192kHz of bit/sampling rates. Because MQS delivers about 6.5 times more detail than a conventional CD format (16bit/44.1kHz), listeners can enjoy a better and a more realistic sound quality.

Product Description

After successfully launching the AK100 and the AK120 models, we asked ourselves, “What is the ultimate sound quality?” After much consideration, we decided to move a step further with our goal, which is to deliver the sound “exactly as the artist had intended” for us to hear. Moving from the AK100 to AK120, we decided to provide a Dual DAC setup to create better left and right channel separation with clearer sound quality. We thought that the Dual DAC setup would be enough, but while developing the AK240, we felt the need to further improve sound quality in order to accurately reproduce the original sound recording. After countless hours of research and testing, we were able to find the answer.
The answer was to create both a balanced output and native DSD playback through the Dual DAC setup.
Now with the AK240, we can dare say that we have gotten “that much closer” to the sound quality of the original recording.


  • Balanced and unbalanced 3.5mm outputs
  • 256GB of built in storage plus a micro SD slot for an extra 128GB
  • Native DSD support
  • Beautifully crafted leather case
  • USB DAC feature
  • Support for all the major file formats – WAV, FLAC, WMA, MP3, OGG, APE(Normal, High, Fast), AAC, ALAC, AIFF, DFF, DSF


The AK240 has oodles of upgrades, including an entirely new Android based operating system, 256GB of storage and a micro SD slot for an extra 128GB of storage. Both balanced and unbalanced 3.5mm outputs plus an active matrix OLED screen. It looks like something from Blade Runner and the tech involved is for the serious connoisseur of audiophile DAPs.

Dual DAC meets Balanced Output

It did not take A&K long to figure out that the AK240’s Dual DAC and balanced output resulted in the best sound. During the development of the AK100 and AK120, Astell&Kern’s specific analogue amp setup was already creating full balanced analogue signals streaming from the DAC and they were able to move a step closer towards the original sound by then creating a balanced output terminal at the end.


  • Dimensions: 2.32 x 3.5 x 0.55
  • Weight: 5 oz
  • DAC: Dual (2) Wolfson WM8740
  • Display: 2.4 IPS Touch Screen (320×240)
  • Memory: 128GB Internal Flash, Dual Micro SD Card Slots (64GB Each)
  • Bluetooth: 3.0/A2DP
  • Output Level: 1.5V RMS
  • THD+N: <0.0008%
  • Signal to Noise: 113 dB
  • Frequency Response: -0.02 dB/20Hz 20kHz
  • Jitter: 50 PS
  • Output Impedance: 3ohms


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