Portable USB headphone amps

Specs as supplied by the manufacturer.

Astell&Kern AK10 Headphone Amp/DAC $299.00

DAC: Wolfson WM8740 24-bit DAC


  • IOS: iPhone5th, iPod touch 5gen (Max 24bit, 48kHz)
  • Android: Galaxy S3, S4, Note2 (Max 16bit, 44.1kHz)
    Note3 (Max 24bit, 96kHz)
    Supports up to the JellyBean 4.1.2 OS / OTG Support
  • Windows XP, Windows Vista,7,8 (32/64bit) (Max 24bit, 96kHz)
  • Mac OS X 10.6.5 and up (Max 24bit, 96kHz)

Looks like a rebadged Beyerdynamic

Added 1/2014