Astell&Kern AK100II Portable High Definition Sound System

Audio Performance:

• Frequency Response:
  • Unbalance & Balanced: 20 Hz to 20 kHz ±0.025dB
  • Unbalance & Balanced: 10 Hz to 70 kHz ±0.6dB
• Signal to Noise Ratio: Balanced & Unbalanced: 115 dB @ 1 kHz
• Crosstalk:
  • Balanced: 130 dB @ 1 kHz
  • Unbalanced: 127 dB @ 1 kHz
• THD + N:
  • Balanced: 0.0008% @ 1 kHz
  • Unbalanced: 0.0009% @ 1 kHz
• IMD SMPTE:
  • Balanced: 0.0003% 800 Hz 10 kHz (4:1)
  • Unbalanced: 0.0004% 800 Hz 10 kHz (4:1)
• Output Impedance:
  • Balanced Out 2.5 mm: 1 Ω
  • Phones 3.5 mm: 2 Ω

General Specifications:

• Display: 3.31" WVGA (480 x 800) AMOLED 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
  • DSD128: 1bit 5.6 MHz Stereo
• Output Level:
  • Balanced: 1.7 Vrms (condition no load)
  • Unbalanced: 2.0 Vrms (condition no load)
• DAC: 1 x Cirrus Logic CS4398 (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: MTP (Media Device)
• Outputs:
  • Balanced Out: 2.5 mm (only 4-pole supported)
  • Phones: 3.5 mm
  • Optical Out: 3.5 mm
• Wi-Fi: 802.11 b/g/n (2.4 GHz)
• Bluetooth: V4.0
• Clock Sources: Clock Jitter: 50 ps (Typical)
• Battery: 3,150 mAh 3.7 V Li-Polymer Battery
• Memory:
  • Built-in Memory: 64 GB NAND
  • External Memory: 1 x microSD (Max 128 GB)
• Supported Operating System:
  • Windows XP, Windows 7,8 (32/64 bit)
  • Mac OS X 10.7 and up
• Body Material: Aluminum
• Dimensions (WxHxD): 2.2 x 4.4 x 0.6" / 5.5 x 11.1 x 1.5 cm
• Weight: 6.0 oz / 169.8 g

Warranty: 1 year