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Your Next Premium, AK70 MK

  • CS4398
    Dual DAC
  • 24bit 192kHz
    bit to bit play
  • Balanced
    Output
  • USB Audio
    (Digital Out)
  • AK Connect
    App
  • Metal Body
    (Aluminum)
  • CD-RIPPER
    (Support)

Your Next Premium

Back in black and ready to impress! The AK70 MK has a whole lot to offer with its advanced features.

Dual DAC separates the left and right audio channels from input to output
Higher audio output with the same refined sound signature of Astell&Kern
Compact size for easy carrying and one-handed operation

The AK70 has been reborn as the AK70 MK through Astell&Kern's accumulated know-how.

Dual DAC separates the left and right
audio channels from input to output

The advantage of a dual DAC player has now become available to everyone. The AK70 MK is the first model from Astell&Kern to be equipped with a dual DAC for under a thousand dollars. Its separated channel circuit design offers less noise and interference, yet adds more fidelity and audio output power, to create a bigger sound stage with clearer imaging when paired with your favorite cans or speakers.

Dual DAC'S Balanced Output
DAC
CS4398
L+
L-
L+
L-
GND
DAC
CS4398
R+
R-
R+
R-
GND
A-amp
L+
L-
R+
R-
phone
Output from other products
DAC
L
R
GND
phone

Higher audio output with the same refined
Astell&Kern sound signature

With a substantial power output of 4.0Vrms from the balanced output, the AK70 MK can drive a wide range of heavy, hard-to-drive headphones without a problem thanks to Astell&Kern's latest audio design technology.

While maintaining the natural and neutral tone and sound signature Astell&Kern is famous for, the newly designed audio circuit creates authentic sounds by exceeding previous Hi-Fi Audio specifications, including SNR, Crosstalk, and THD+N, over previous models.

The powerful AK70 MK's sound quality is sure to please even the most discerning music aficionado.

AK70 MK vs. AK70

AK70 MK vs. AK70
Model AK70 MK AK70
 
DAC Dual DAC (Cirrus Logic CS4398 x2) Single DAC (Cirrus Logic CS4398 x1)
Output Level Balance 4.0Vrms / Unbalance 2.0Vrms
(Condition No Load)
Balance 2.3Vrms / Unbalance 2.3Vrms
(Condition No Load)
Signal to Noise Ratio Unbalance 118dB @ 1kHz
Balance 119dB @ 1kHz
Unbalance 116dB @ 1kHz
Balance 116dB @ 1kHz
Crosstalk Unbalance 136dB @ 1kHz
Balance 138dB @ 1kHz
Unbalance 130dB @ 1kHz
Balance 130dB @ 1kHz
THD+N Unbalance 0.0005% @ 1kHz
Balance 0.0005% @ 1kHz
Unbalance 0.0008% @ 1kHz
Balance 0.0007% @ 1kHz
Clock Jitter 45ps(Typ) 50ps(Typ)
Battery 2,500mAh 3.7V Li-Polymer 2,200mAh 3.7V Li-Polymer

* SNR (Signal to Noise Ratio): As the signal-to-noise ratio increases, the clearer the sound becomes.
* CROSSTALK: The higher the number in the crosstalk specification, the higher the isolation in the Left/Right channels develops.
* THD+N (THD + Noise, Distortion): over the THD + Noise signal rate, less distortion is heard.
* Jitter: With smaller figures representing irregular tremors of the signal waveform, the better the device performs.

Compact size for easy carrying
and one-handed operation

AK70 MK delivers superb Hi-Fi audio quality in a pocket-sized portable,
a must-have feature for listeners who want high quality sound any place and anytime.
No need to compromise with lossy, compressed music anymore.

The ergonomic body design fits nicely in the palm of the hand,
making operation a smooth, one-handed experience.

24-bit, 192 kHz
Bit-to-Bit Playback

The AK70 MKⅡ plays any resolution of digital files up to 24-bit/192 kHz, bit-for-bit.
32-bit audio and single or double rate DSD can also be played, but it will be converted to PCM or downsampled.

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

32bit SRC by the AK70 MK
32-bit
MQS
32-bit
Delivery
CPU
Conversion to 24bit
24-bit
Delivery
CS4398 DAC
DSD-to-PCM Conversion by the AK70 MK
DSD 64/128
DSD
Delivery
CPU
DSD-to-PCM Conversion
PCM
Delivery
CS4398 DAC

Balanced Out

The AK70 MK delivers original sound using the 2.5mm 4-pole balanced output that Astell&Kern first pioneered on the AK240 (and other manufacturers soon adopted). The balanced out provides a more powerful audio signal with less noise interference.

Noise Detected during
Balanced Output

Noise

hot signal

cold signal

Ground or ground line

Noise Removed
After Detection

Noise

hot signal

cold signal
reversed

Ground or ground line

Noise Removal Complete

signal
synthesis

Ground or ground line

USB Audio

A simple USB connection will allow the AK70 MK to be used as a digital music storage device and/or pre-amp to output digital audio through USB.
The AK70 MK transfers DSD in native format through DoP (DSD over PCM) and converts DSD to PCM for output
for external USB Audio that do not support DoP.

* USB audio (Digital Out) output is available only when an external device can accept digital input through USB.
* DoP (DSD over PCM): This is the standard for transferring DSD data to a USB interface and sends DSD data by mounting them onto PCM data frames.
* The type of OTG cable to connect the AK70 MK with a portable amp differs depending on the specs of the amp. An OTG cable is not included in the AK70 MK package.

USB
Audio

OTG Connector + Regular Cable Connect

USB
Audio

OTG Cable Connect

USB Audio (Digital Out) Specs
DoP : 2.8MHz / 5.6MHz
PCM : Max 384kHz

USB DAC

Connect to your PC/Mac computer, or other system, via a USB cable and use the AK70 MK's hardware to provide better sound quality.
The AK70 MK, when used as a USB DAC, will bring out more detail and provide a better listening experience than your computer is capable of delivering, even when listening to your favorite streaming service!

When using the AK70 MK as a USB DAC, playback up to 24-bit, 96kHz is supported to deliver a much richer sound through a larger soundstage and resolution that goes far beyond the limits of an embedded sound card.

Want to easily play back DSD on your computer? No problem. Using the PC's embedded sound card usually requires a complicated process to playback DSD data, but with the AK70 MK, simply install our DAC driver on your PC/MAC and play DSD with ease.

* AK70 MK supports up to 24-bit 96 kHz with USB audio class 1.0 specs.
* DSD 64/128 is converted via DSD-to-PCM for playback.

PC / MAC

PCM USB

USB Audio Class 1.0 (Max 24bit 96kHz)

Line Out

Headphone

Speaker

AK Connect

AK Connect, a DLNA-based music control app, is available on the AK70 MK and smart devices including your phone or tablet.
You can easily control playback, volume, streaming over Wi-Fi and more with this free app from Astell&Kern.
AK Connect allows for convenient access to all of your connected music libraries including your smart devices, computers, NAS drive, other Astell&Kern Wi-Fi enabled products or any other DLNA compatible music system on your local network.
AK Connect app is available for both iOS and Android devices.

Smartphone Tablet AK Connect APP CONTROL PLAYBACK Astell&Kern Player PC NAS

The AK Connect Apps Download

The AK Connect apps are available for download from the Google Play Store and the Apple App Store.

[AK70 MK] AK Connect

[Phone] AK Connect

[Tablet] AK Connect HD

AK CD-RIPPER

The AK70 MK allows users to rip CDs with ease by connecting our AK CD-RIPPER accessory.
Our exclusive CD-RIPPER can rip your CDs directly to the AK70 MK with 100% error-correction. When connected to Wi-Fi, all metadata for the CD being ripped will be downloaded from the Gracenote™ database, and all of the tagging information will be stored for each album.
The combination of the AK70 MK and AK CD-RIPPER make it simple and easy to digitize your entire CD collection.

* The AK CD-RIPPER may not be properly recognized when using a power supply adapter rated at less than 5V 2A.

Power Connection

AK70 MK