Portable USB headphone amps

Specs as supplied by the manufacturer.

Audioengine D3 $189.00

24 bit / 96 kHz DAC with asynchronous USB input and headphone out.

 

  • Full-scale output 2.0V RMS
  • Frequency response 10Hz - 25kHz (+/- 0.5dB)
  • SNR (DC to 20kHz) 110dB
  • THD+N (1kHz FS 96 kS/s) <0.002%
  • Crosstalk -110dB
  • USB transfer mode Asynchronous (dual clock)
  • USB device class Type 1.1 or above
  • Input USB Audio Input bit depth up to 24 bits (upsampled)
  • Input data rate up to 192KS/s (96K native)
  • Output Analog audio mini jack
  • Output impedance 10 ohms
  • Suggested headphone impedance 12 ohms to 10Kohms
  • Headphone amplifier LME49726
  • D/A converter AKM4396
  • USB controller TI1020B
  • Power requirement USB 5V DC, 200mA
  • USB power filtering 2-stage redundant regulation
  • Product dimensions 19x12x6mm (including USB connector)