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Astell & Kern AK Jr. Hi-Res Music Player

SuperJunior Blue

  • Increased output and lowered impedance

    The AK Jr's output level of 1.95 VRMS represents a 14% increase over the AK100's 1.5 VRMS. Our engineers have reduced the output impedance to 2 Ohms for a significant gain in sound fidelity from the AK100’s 22 Ohms.

    As the AK Jr supports many various types of earphones and headphones, a separate amplifier is unnecessary.


    The AK Jr can also function as an external DAC (sound card) when connected to a PC or Mac via USB.
    When playing music stored on a computer, the AK Jr delivers the same high level of audio quality while eliminating the need for a built-in sound card.

    - The AK Jr's EQ settings are disabled when used as a USB DAC. The USB DAC feature also supports UAC 1.0 (USB Audio Class 1.0 / 24-bit, 96 kHz) audio output.

     DSD to PCM 

    The AK Jr supports DSD, the digital audio format widely considered to be the next-generation in high resolution audio. 
    Listen to a greater range of audio through DSD.

    - The AK Jr converts 2.8 MHz DSD files to PCM.

  • Thin and Light
    Increase Output and lowered impedance
    DSD to PCM
    Full Touch Screen
    64GB + 64GB

  • Display: 3.1inch WQVGA (240 x 400) Touchscreen
    Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE (Normal, High, Fast), AAC, ALAC, AIFF, DFF, DSF
    Sample Rate: FLAC, WAV, ALAC, AIFF : 8kHz ~ 192kHz (8/16/24bits per Sample) / DSD : DSD64 (1bit 2.8MHz), Stereo (DSD to PCM)
    Output Level: 1.95Vrms
    DAC: Wolfson WM8740 x1 (Single DAC)
    Decoding: Supports up to 24bit / 192kHz Bit to Bit Decoding
    Charging Interface: Micro USB Type-B
    Interface: USB 2.0, Headphone Out 3.5mm
    Feature Enhancements: Firmware upgrades supported

  • Micro USB Cable
    Set of Screen Protectors
    Limited 1-Year Warranty