Fostex HP-A3 Headphone Amp/DAC

The Fostex HP-A3 has many great features.  It's a USB powered unit that can accept high resolution files up to 24/96kHz over USB or Toslink optical connections.  Plus the HP-A3 can be used as a stand alone DAC that can send audio through an optical output.  Besides a great headphone amp that can power most headphones, it can also function as a pre-amp using the RCA outputs to a set of powered/active speakers.  In this price range, it's hard to find a product that has all these features and performs as well as the HP-A3.

Product Features:

  • 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
  • Note: When using the USB input, the sampling frequency is fixed at 96kHz. Audio file with Fs 32k/44.1k/48kHz will be reproduced by upsampling to 96kHz and the S/PDIF Out is also fixed at 96kHz.