Fostex HP-A4 24-bit DAC and Headphone Amplifier

Fostex

Model 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.

  • 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 Filter 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 future firmware update.***

    * requires a DSD playback software on PC such as the upcoming "FOSTEX Audio Player". Both DoP and ASIO acceptable.

    ** requires the dedicated driver for Windows. Not compatible with Windows XP 64bit.

    *** does not playback audio data stored on a microSD card

  • USB buss powered operation

    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

  • Input

    USB port sampling frequency up to 24bit/192kHz(PCM), 5.6MHz(DSD)

    Interface USB high speed

    Digital Connector: optical, square

    Format S/PDIF (16bit/24bit: 44.1 – 192kHz)

    Output

    Phones Connector: Stereo phone

    Max Output: 100mW (32-ohm loaded)

    THD: less than 0.04% at 1kHz, 32-ohm loaded, 100mW

    Frequency response: 20Hz - 80kHz +/-3dB (1kHz, 32ohm loaded, 100mW, FS 192kHz) V Analog Connector: RCA Pin

    Reference output level 2Vrms

    THD: less than 0.01% at 1kHz

    Frequency response: 20Hz - 80kHz +-3dB (at FS 192kHz)

    Digital Connector: Optical, square

    Format S/PDIF (16bit/24bit: 44.1 - 192kHz)

    General MicroSD card slot: microSD card (SDHC)

    Power: USB buss powered

    Power Consumption: 2.5W

    Accessories: 1 x USB cable (1.0m), 4 x rubber foot, manual

    Dimensions: 113mm(W) x 34mm(H) x 155mm(D) excluding protruded parts

    Weight: approx. 500g