Fostex HP-A4 USB DSD Digital Analogue Converter

Fostex HP-A4 USB DSD Digital Analogue Converter
 Fostex HP-A4 USB DSD Digital Analogue ConverterFostex HP-A4 USB DSD Digital Analogue Converter 
(£274.17 Exc. VAT)

Call: 01892 532995

Free U.K. Delivery


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01892 532 995

Free standard next day delivery
  • Improved version of the acclaimed HP-A3
  • USB buss powered operation without AC adapter
  • Quick and easy hi-resolution playback
  • HI/LO Gain selection (10dB) for headphones
  • Asynchronous transfer mode via custom made crystal
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Why buy from us?

Fostex HP-A4 USB DSD Digital to Analogue Converter

The HP-A4 is a new, improved version of the acclaimed HP-A3. It offers up to DSD 5.6MHz and PCM 192kHz for superior audio playback functionality as well as the sophisticated and class-leading appearance of the flagship HP-A8C.

 The HP-A4 is powered directly from the USB bus, so there is no need for bulky power supplies, making it great for listening on the move. The headphone amplifier features a hi/lo gain selector for matching different requirements.

 The front panel also features two filter settings, RCA output or headphone selector and input selector for USB or optical sources. There is also a sample rate indicator to show the type of file playing. Used in conjunction with the free Fostex Audio Player most hi-resolution formats can be played back, including DSD.

Shipping typically 1-2 days
  • USB buss powered operation without AC adapter
  • Linear PCM audio up to 24bit/192kHz and DSD audio up to 5.6MHz playback *
  • Quick and easy hi-resolution playback in combination with "FOSTEX Audio Player" software
  • HI/LO Gain selection (10dB) for wider range of headphones
  • Asynchronous transfer mode by using the custom made crystal
  • Digital Filer selecting Roll-off characteristics and Cut-off characteristics according to the audio source
  • Complies with USB Audio Class 2.0 on Windows XP (SP2 or later) / Vista / 7 / 8 and MacOS X 10.6 or later **
  • MicroSD (SDHC) card drive on the rear panel for firmware update only – no audio playback

* DSD  requires playback software such as the Fostex Audio Player.  Both DoP and ASIO acceptable.
** requires the dedicated driver for Windows (downloadable from the Fostex website).  Not compatible with Windows XP 64bit.


  • Input: Optical S/PDIF (16bit/24bit-44.1/192kHz)
  • Input: Optical S/PDIF (16bit/24bit - 44.1/192kHz)
  • Output Headphones: Stereo 1/4inch Jack
  • Output Line: RCA Phono


  • Power Consumption: 2.5W
  • Power Supply: USB Bus Powered


  • Frequency Response: 20Hz-80kHz +/-3dB
  • Max Headphone Output: 100mW(32-ohm loaded)
  • Sample Rates: Up to 24bit/192kHz(PCM) or 5.6MHz(DSD)
  • THD - headphones: less than 0.04% at 1kHz, 32-ohm loaded, 100mW
  • THD - line out: less than 0.01% at 1kHz
  • THD-Headphones: less than 0.04% at 1kHz, 32-ohm loaded, 100mW
  • THD-Line Out: less than 0.01% at 1kHz

Physical Proportions

  • Dimensions: 113mm(W)x34mm(H)x155mm(D)
  • Weight: 500g

UK Delivery

  • FREE delivery via DPD Local By 12pm on orders to value over £300, including one hour delivery window service 'Predict & Follow My Parcel'.
  • Royal Mail Special Delivery By 1pm costs between £5.00 - £10.00 on orders to value under £300, dependent on weight.
  • Saturday or Sunday delivery available upon request for supplemental charge.

EU Delivery

  • £25 delivery charge 'Flat Fee' via DHL Europe by Road service (3-5 days) which provides comprehensive tracking of shipments online.
  • £60 delivery charge 'Flat Fee' via DHL Europe by Air service  (1-2 days) which provides comprehensive tracking of shipments online.

USA & Canada Delivery

  • Services based on your order being shipped to the U.S. and Canada are calculated as follows:
    £100 delivery charge 'Flat Fee' via DHL international 'Day Definite' service per parcel.
    Receiver is responsible for the payment of local Duties and Taxes.


  • Not all products are available for order into Europe, USA & Canada


  • Full manufacturer's warranty on all new purchases. Standard warranty is typically 2 years with some goods coming with 6 years manufacturer's warranty.
  • Goods purchased in UK and EU are covered by the Consumer Contracts Regulations.

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