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Fostex HP-A3 32-Bit Digital to Analog Converter and Premium Headphone Amplifier

Item # FSXHPA3 (Part # AMS-HP-A3)
Brand new, USA Warranty
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Item Description:
  • 32bit D/A converter with USB bus power
  • Works with up to 24bit/96kHz audio source
  • High quality analog headphone amp to drive any type of headphones
  • USB/digital (optical) input selector; headphones/RCA (analog) output selector
  • The new Fostex HP-A3 is the perfect DAC for Computer Audio. This high quality unit features 32bit D/A Conversion with an integrated headphone amplifier exclusively designed to get the most from and PC audio set-up.

    Why settle for 'built-in' D/A conversion when you can drastically improve the quality of your audio with a Fostex HP-A3?

    USB Cables

    Now available, new ET-U1.0 and ET-U0.5 USB constructed using OCF Ag coated annealed copper wire.

    Windows and Mac OS Compatibility

    We confirmed the compatibility with Windows XP*(SP2 or later) / Vista / 7 / 8 / 8.1 / 10 and Mac OSX(10.6 or later).
    * Not compliant to XP 64bit.

    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.

    Product Specifications:


    • USB port sampling frequency 16bit-24bit/96kHz
    • Interface: USB full speed
    • Digital Connector: optical, square
    • Format: 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
    • Accessories: 1 x USB cable (1.0m), 4 x rubber foot, manual
    • Dimensions: 108mm(W) x 36mm(H) x 140mm(D)
    • Weight: approx. 450g
    HP-A3 D/A Converter & Amplifier
    1.0m USB Cable
    Rubber Foot (4)
    Owner's Manual
    This Kit Includes:

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