Astell&Kern AK Jr Portable High Definition Music Player and DAC

Astell&Kern AK Jr Portable High Definition Music Player and DAC

Astell&Kern AK Jr Portable High Definition Music Player and DAC

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Product Highlights

  • Bit-to-Bit Mastering Quality Sound (MQS)
  • Wolfson WM8740 x1 (Single DAC)
  • 2.8 MHz DSD Support
  • Bluetooth Compatible
  • 3.1" WQVGA (240 x 400) Touchscreen
  • 64GB Internal Flash Memory
  • 256GB microSD Card Slot
  • 5-Band EQ
  • Integrated Volume Wheel
  • Brushed Aluminum Body
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Astell&Kern 3PPE117C-CMSIN1 overview

  • 1Description

The AK Jr Portable High Definition Music Player and DAC from Astell & Kern is a pocket-sized audio system capable of studio Mastering Quality Sound (MQS) support and playback. MQS is a high definition digital music format operating at 24-bits and sample rates from 96 to 192 kHz, which translates to distortion-free sound without data loss. MQS sources are commonly saved as a lossless 24-bit WAV or FLAC files during record production at the time of the mastering source. The AK Jr also supports 2.8 MHz DSD64 playback by converting to PCM.

The AK Jr has an integrated single-channel Wolfson WM8740 DAC providing exceptional sonic quality and detail. It can also be used as an external DAC when connected to a Mac or PC via USB. The player features 64GB of internal flash memory and a microSD card slot that supports up to 256GB from a separately sold card. This allows you to store a maximum of 320GB of high definition lossless music.

The 3.1" WQVGA touchscreen provides smartphone-style control over playback, while the sleek aluminum body and volume wheel provide a smooth analog feel. The built-in battery recharges via USB and lasts for up to 8 hours of playback. The AK Jr ships with a set of screen protectors, a micro-SD card slot cover, and a micro-USB cable.

Mastering Quality Sound (MQS)
Supports playback of 24-bit, 96 - 192 kHz sound files
2.8 MHz DSD playback
Hi-Fi Audio
Integrated Wolfson WM8740 DAC allows the player to provide high definition quality and detail, and can be used as an external DAC for PC or Mac.
Wirelessly stream music to any Bluetooth compatible device such as headphones, home hi-fi systems, and car stereos.
Storage Space
Save high definition lossless music to the 64GB internal flash memory. The player also has a microSD card slot supporting 256GB for expanded storage space
Built-in Rechargeable Battery
The built-in rechargeable lithium-polymer battery has a capacity of 1450mAh and can be recharged via USB. Listen continuously for up to 8 hours on a charge
High Output Impedance
Headphone Output: up to 2Ω
Balanced Output: 1Ω
5 Band EQ
Extended frequency control with a 5 band graphic EQ in .5 dB increments. In addition, multiple user EQs are supported so that users may create custom EQs to fit each music genre and change them whenever desired.
Full Touch Screen
Smartphone-style controls of the AK Jr with a large 3.1" WQVGA touch screen
In the Box
Astell&Kern AK Jr Portable High Definition Music Player and DAC
  • Micro-USB Cable
  • 2 x Screen Protectors
  • Micro SD Card Slot Cover
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Astell&Kern 3PPE117C-CMSIN1 specs

    Audio Performance
    Frequency Response ±0.04 dB (Condition: 20 Hz to 20 kHz) / ±0.3 dB (Condition: 20 Hz to 70 kHz)
    Signal to Noise Ratio 112 dB @ 1 kHz
    Crosstalk 120 dB @ 1 kHz
    THD + N 0.005% @ 1 kHz
    IMD SMPTE 0.0006% 800 Hz to 10 kHz(4:1)
    Output Impedance 2 ohms
    General Specifications
    Display 3.1" 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: 8 to 192 kHz (8/16/24 bits per sample)
    DSD64: 1bit 2.8 MHz Stereo (DSD to PCM)
    Output Level 1.95 Vrms
    DAC 1 x Wolfson WM8740 x1 (single DAC)
    Decoding Support up to 24 bit/192 kHz (bit to bit decoding)
    Input USB Micro-B Input: For charging & data transfer (PC & Mac)
    Connection Mode: UMS(USB Mass Storage)
    Outputs Phones: 3.5 mm
    Bluetooth V4.0
    Clock Sources Clock Jitter: 50 ps (Typical)
    Battery 1,450 mAh 3.7 V Li-Polymer Battery
    Memory Built-in Memory: 64 GB NAND
    External Memory: 1 x microSD (Max 256 GB)
    Supported Operating System Windows XP, Windows 7,8 (32/64 bit)
    Mac OS X 10.7 and up
    Body Material Aluminum
    Dimensions (WxHxD) 2.1 x 4.6 x 0.4" / 5.3 x 11.7 x 0.9 cm
    Weight 3.3 oz / 93.0 g
    Packaging Infoxfarvayzxvdfbbsd
    Package Weight 0.6 lb
    Box Dimensions (LxWxH) 7.7 x 4.0 x 0.8"

    Astell&Kern 3PPE117C-CMSIN1 reviews

    AK Jr Portable High Definition Music Player and DAC is rated 4.2 out of 5 by 41.
    Rated 5 out of 5 by from I would buy another one I like it! I've wanted an AK for a while and the Jr suits my needs. I like being able to play many different file types, FLAK especially. I been using Beyerdynamic T5p headphones and really have enjoyed the sound. I take it to the gym and use Shure 535 in ear monitors, again the sound is great. I really like not having to use Itunes. I prefer to management my music in files. The touch screen action is less than stellar, but perfectly acceptable to me. The thing I miss is having a clip so it don't fall out of my pocket. The physical size is perfect. The sound quality is all I hoped for. The construction quality appears top notch.
    Date published: 2016-12-07
    Rated 2 out of 5 by from Incredible sound, incredibly terrible UI and firmware Hands down the best sound you can possibly find for the price. Worth it if you plan on only using it as a USB DAC. You will have to disable USB 3.0 to make it work in this capacity, one of many issues with this player. Even after upgrading firmware, UI is buggy and slow, it won't even play album tracks in the correct order! It's borderline unusable. But the DAC sounds so good, what a shame! I decided to return mine because I need a player that is actually functional standalone. If there is ever a Rockbox port for this, or someone figures out how to hack the firmware into something halfway decent, I would buy one back in a heartbeat. In the meantime I'm not holding my breath for the firmware to get fixed by iriver, it's been like 2 years gimme a break.
    Date published: 2017-01-15
    Rated 5 out of 5 by from Perfect for Enjoyment of Quality tracks If your a songwriter and are looking for a high quality playback device to listen and share your mixes without the pitfalls of iphones/android phones like Sony xperia that claim to have high quality sound but actually do not, then your not going to be disappointed with this product. The typical HR Audio hype with Sony Xperia does not disclose the high crosstalk in their device. I'm sure Apple's iphone/ipod, ect... is not that great either, not to mention the under powered headphone amp. The AK Jr. sound is Fat and Wide, I bought it used in perfect shape here, no regrets for my purposes. I use a pair of AT MSR7's with it, its truly great. Thanks B&H!
    Date published: 2017-07-05
    Rated 4 out of 5 by from Outstanding sound, UI needs tweeking This unit is amazing, if for no other reason than its tiny, svelt form (I also bought the leather glove designed for it but not available from US sources yet). The sound is detailed, wide and powerful enough to drive my Grado SR 325e as well as my Westone UM Pro-3 sets. My only criticisms are about the control interface. The screen reacts slowly and sometimes misses a swipe command (this could be a result of the screen protector installed by the company). Further, the album selection screen refuses to display the album covers of about 25% of my albums no matter what I do. Those are minor gripes considering the terrific sound produced except that this unit is not cheap and such flaws should be accounted for at this price.
    Date published: 2015-11-18
    Rated 3 out of 5 by from Good Audio Quality The player matched the reviews I read before purchase. I give it a 5 for audio quality, 3 for interface, 3 for blue tooth, and 3 for output power. The software is slow to find songs, the blue tooth does not consistently interface with other devices, and it could have more power. But, for the price, can't beat the audio quality.
    Date published: 2016-05-30
    Rated 5 out of 5 by from Upgrade from the MP3 players I bought it as an upgrade to my iphone to listen the Hi res music. It delivers what I had expected from a Hi resolution DAC player. It has come with in-bulit 64 GB memory and an optional slot for micro SD card. I have been using the Sandesk 200 GB micro SD without any issues. Overall it is a great product.
    Date published: 2016-12-15
    Rated 5 out of 5 by from Excellent sound quality I have had a Cowon Z2 for a couple years and this player has an even crisper, cleaner sound. The AK Jr has a Wolfson 8740 DAC and it produces wonderful, muscular sound at all frequencies, clean, tight bass, strong midrange and crystal clear highs. Being 70 years old I have the typical high frequency hearing loss and need the crisp highs to compensate. The AK Jr, coupled with my Grado 225e headhphones and Objective 2 amp, make a perfect match. Highly recommended . . . Bob
    Date published: 2016-10-13
    Rated 4 out of 5 by from Buy strictly for high quality sound at a good price. I am fairly new to the lossless/hi-fi DAP world. The sound quality paired with my B+W P7 headphones is VERY impressive. The unit itself at the current price point(approx $300) is well worth it if youre looking for a basic audio player with excellent sound quality. There arent alot of fancy features but it does have bluetooth, an EQ, and a micro SD expansion slot that can support 256gb cards at the moment. Like alot of reviewers have said, it can lag at times and navigation through a large library can take a while. If you want something that responds like an apple ipod/iphone, I would highly recommend NOT buying this product. One last note, the size is great since its not as boxy and heavy as alot of the other comparable players.
    Date published: 2017-05-09
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