The Astell & Kern AK Jr simplifies complex features of Hi-Fi audio to a smartphone-like experience. The simplified design exemplifies the original concept of the Astell & Kern AK Jr. The raised screen provides secure grip and slims down the profile from 8.9mm to 6.9mm. The full aluminum body and textured aluminum volume wheel allows smooth one-handed operation.
Increased output and lowered impedance
The Astell & Kern 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 Astell & Kern AK100’s 22 Ohms.
As the Astell & Kern AK Jr supports many various types of earphones and headphones, a separate amplifier is unnecessary.
DSD to PCM
The Astell & Kern 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 Astell & Kern AK Jr converts 2.8 MHz DSD files to PCM.
The Astell & Kern 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 Astell & Kern 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.
Full Touch Screen
The Astell & Kern AK Jr features a 3.1″ LCD touchscreen that is about 1.4 times larger than the AK100’s LCD. The smartphone-like full touch capabilities offer responsive interface and the larger screen displays more information.
Album covers that are in a 4:3 format on the Astell & Kern AK100 are now displayed 1:1 aspect on the Astell & Kern AK Jr’s larger screen.
64GB + 64GB microSD
The Astell & Kern AK Jr features 64GB of memory to store more music than ever before. Supporting microSD cards up to 64 GB, the Astell & Kern AK Jr is capable of offering a whopping total storage capacity of 128 GB.
The combined 128GB of internal memory and external microSD card capacity is capable of holding more than 1,250 high resolution audio. (Based on one, 4-minute song @ 24 bit/96 kHz, taking up 90MB)
- Body Color: AK Jr : Sleek Silver / SUPER JUNIOR x AK Jr : Sapphire Blue
- Body Material: Aluminum
- 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: Support up to 24bit/192kHz Bit to Bit Decoding
- Input: USB Micro-B input(for charging & data transfer (PC & MAC)) / Connection Mode: UMS(USB Mass Storage)
- Outputs: PHONES (3.5mm)
- Bluetooth: V4.0 (A2DP, AVRCP)
- Dimensions: 2.08” (52.9 mm) [W] x 4.60” (117 mm) [H] x 0.35” (8.9 mm) [D]
- Weight: 93 g
- Feature Enhancements: Firmware upgrades supported (F/W file copy)
- Frequency Response: ±0.04dB (Condition: 20Hz~20kHz) / ±0.3dB (Condition: 20Hz~70kHz)
- Signal to Noise Ratio: 112dB @ 1kHz
- Crosstalk: 120dB @ 1kHz
- THD+N: 0.005% @ 1kHz
- IMD SMPTE: 0.0006% 800Hz 10kHz(4:1)
- Output Impedance: 2ohm
- Capacity: 1,450mAh 3.7V Li-Polymer Battery
- Built-in Memory: 64GB [NAND]
- External Memory: 1 x microSD (Max 64GB)
- Supported OS: Windows XP, Windows 7,8 (32/64bit), MAC OS X 10.7 and up