Astell & Kern AK Jr Ultra Slim 64GB Hi-Res Audio Player (Silver)

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Although some of the first Astell&Kern players were a portable device, its relatively large size made it less convenient for some. The AK Jr’s compact design delivers the highest sound quality while fitting comfortably in your pocket.

Carrying a small concert in the palm of your hands with the AK Jr!

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 Ratio112 dB @ 1 kHz
Crosstalk120 dB @ 1 kHz
THD + N0.005% @ 1 kHz
IMD SMPTE0.0006% 800 Hz to 10 kHz(4:1)
Output Impedance2 ohms
Display3.1" WQVGA (240 x 400) touchscreen
Supported Audio FormatsWAV, FLAC, WMA, MP3, OGG, APE (Normal, High, Fast), AAC, ALAC, AIFF, DFF, DSF
Sample RateFLAC, WAV, ALAC, AIFF: 8 to 192 kHz (8/16/24 bits per sample)
DSD64: 1bit 2.8 MHz Stereo (DSD to PCM)
Output Level1.95 Vrms
DAC1 x Wolfson WM8740 x1 (single DAC)
DecodingSupport up to 24 bit/192 kHz (bit to bit decoding)
InputUSB Micro-B Input: For charging & data transfer (PC & Mac)
Connection Mode: UMS(USB Mass Storage)
OutputsPhones: 3.5 mm
Clock SourcesClock Jitter: 50 ps (Typical)
Battery1,450 mAh 3.7 V Li-Polymer Battery
MemoryBuilt-in Memory: 64 GB NAND
External Memory: 1 x microSD (Max 256 GB)
Supported Operating SystemWindows XP, Windows 7,8 (32/64 bit)
Mac OS X 10.7 and up
Body MaterialAluminum
Dimensions (WxHxD)2.1 x 4.6 x 0.4" / 5.3 x 11.7 x 0.9 cm
Weight3.3 oz / 93.0 g

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