$299 $349
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  • USB Bus power without using unwanted AC adapter
  • Works with up to 24bit/96kHz audio source
  • Exclusive PLL power supply is built in to reproduce the stable electrical supply
  • High quality analog headphone amp to drive any type of headphones
  • Equipped with hgih-grade AKM 32bit(*) DAC AK4390
  • Condensers and OP amp designed exclusively for audio products
  • USB / Digital (Optical) input selector
  • Headphones / RCA (Analog) output selector
  • Doubles as D/D converter from USB digital audio to Optical
  • An USB/AC adapter from the shelf can be used for use as an Optical / Analog converter

USB port sampling frequency



USB full speed

Digital Connector

Optical, square


S/PDIF (32kHz – 96kHz)


Phones Connector

Stereo phone

Max Output 100mW (32-ohm loaded)
THD Less than 0.01% at 1kHz, 32-ohm loaded, 100mW
Frequency response 20Hz / 20kHz +-0.3dB (32ohm loaded, 100mW)
Analog Connector RCA Pin
Reference output level -10dBV
THD Less than 0.01% at 1kHz
Frequency response 20Hz / 20kHz +-0.3dB
Digital Connector Optical, square
Format S/PDIF (32kHz – 96kHz)
Power DC5V (via USB port)
Power Consumption 2.5W
Dimensions (W,H,D) (mm) 108 x 36 x 140
Weight Approx. 450g
  • Fostex HP-A3 D/A Converter
  • USB cable
  • x4 Rubber feet
  • Owner's manual

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