$129.99 (原价:$259.00)
JoyBuy 现有 Astell&Kern AK Jr 便携HiFi播放器 ，现价$129.99(原价$259)。
美国境内免运费。
比比君推荐：曾经的入门级经典AK Jr 发布时的2999RMB的价格对于这个品牌来讲已经是良心价了，JoyBuy不到1000RMB的价格可以说是很香了，美亚还在卖$200呢。
AK Jr相信烧友们并不陌生了，采用Wolfson WM8740 DAC，能够支持DSD播放，在小巧的体积内拥有不俗的音质。奢华不低调的外观和优异的做工即使在今天来看也绝不过时。
配置参数(来源于Astell&Kern官网)：
- Body: MaterialAluminum
- 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)
- Output: PHONES (3.5mm)
- BT: 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: 3.28 oz (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
- Clock Jitter: 50ps (Typ)
- Battery Capacity: 1,450mAh 3.7V Li-Polymer Battery
- Built-in Memory64GB [NAND]
- External MemorymicroSD (Max 256GB) x1