Fostex HP-A4BL Balanced 24-bit DAC and Headphone Amplifier

Fostex

Model HP-A4BL, designed being based on the current HP-A4, is an affordable USB DAC & Headphone amp offering balanced connection for headphones that is becoming more popular in the market. In addition to the balanced headphone out, it also complies with DSD Audio up to 11.2MHz.

  • Equipped with 4-pin XLR balanced output

    Newly developed audio-grade capacitor is adopted

    Highly precise crystal with low phase noise is adopted

    Playback 24bit/192kHz PCM and 11.2MHz DSD audio

    High performance DAC (Barrbrown PCM1792A) is equipped

    Asynchronous transfer up to 192kHz/24bit compatible with USB Audio 2.0

    HI/LO Gain selection (10dB) for wider selection of headphones

    Digital Filter selecting Roll-Off characteristics and Cut-off frequencies

  • Input
    [USB] terminal
    Interface :USB 2.0 Hi Speed
    Sampling Frequencies :PCM 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz DSD 2.8MHz, 5.6MHz, 11.2MHz
    Quantization :16bit, 24bit
    [Digital In] terninal
    Connector :Optical, Square
    Format :S/PDIF
    Sampling Frequencies :44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
    Quantization :16bit, 24bit

    Output
    [PHONES BALANCED] terminal
    Connector :XLR (4-pin)
    Maximum output :300mW or more (32 ohm)
    Load impedance :16 - 600 ohm
    THD :less than 0.04% (at 1kHz)
    Frequency Response :20Hz - 80kHz (+-3dB, 32 ohm, 100mW)

    [PHONE UNBALANCED] terminal
    Connector :1/4" stereo jack
    Maximum output :300mW or more (32 ohm) Applicable load impedance :16 - 600 ohm
    THD :less than 0.04% (at 1kHz)
    Frequency Response :20Hz - 80kHz (+-3dB, 32 ohm, 100mW)

    [OUTPUT] (L,R) terninal (Analog output) Connector :RCA Pin
    Reference output level :2Vrms (0 dBFS) Applicable load impedance :less than 10k ohm THD :less than 0.01% (at 1kHz)
    Frequency Response: 20Hz-80kHz (+3dB)

    [DIGITAL OUT] terminal
    Connector :Optical (square)
    Format :S/PDF
    Frequency Response :44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
    Quantaization :16, 24bit


    General
    [microSD] card slot (for firmware upgrade only) Format: FAT32
    Compatible card: microSD card (SDHC), up to 32GB
    Accessories :Rubber foot (x4), USB cable, Manual, AC adapter
    Power supply :DC12V
    Measurements :150(W) x 34(H) x 157(D)mm including protrusion
    Weight:approx. 630g