Fostex HP-A4BL 4-pin XLR Balanced Headphone Amplifier & Dac
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Fostex HP-A4BL 4-pin XLR Balanced Headphone Amplifier & Dac

SKU: FTXHPA4BL MFR: AMS-HP-A4BL
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$479.99
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Key Features

  • Experience superior sound quality with this Fostex headphone amplifier and DAC combo.
  • Enjoy versatile connectivity with balanced XLR and unbalanced headphone outputs for flexibility.
  • This headphone amp supports high-resolution audio up to 192kHz/24-bit for detailed listening.
  • Upgrade your listening setup with a headphone amplifier that enhances sound clarity and depth.
  • Achieve optimal headphone performance with impedance matching from 16 to 600 Ohms.
  • Compact and robust design ensures durability and fits seamlessly into your audio setup.
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Special Order?Estimated to Ship: 08/12/2025
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Fostex HP-A4BL Specifications

  • Input: USB - Interface

    USB 2.0 Hi Speed

  • Input: USB - Sampling Frequencies

    PCM 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz DSD 2.8MHz, 5.6MHz, 11.2MHz

  • Input: USB - Quantization

    16bit, 24bit

  • Input: Digital In - Connector

    Optical, Square

  • Input: Digital In - Format

    S/PDIF

  • Input: Digital In - Sampling Frequencies

    44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz

  • Input: Digital In - Quantization

    16bit, 24bit

  • Output: Phones Balanced - Connector

    XLR (4-pin)

  • Output: Phones Balanced - Maximum output

    300mW or more (32Ohms)

  • Output: Phones Balanced - Load impedance

    16 - 600Ohms

  • Output: Phones Balanced - THD

    Less than 0.04% (at 1kHz)

  • Output: Phones Balanced - Freq. Response

    20Hz - 80kHz (+/-3dB, 32Ohms, 100mW)

  • Output: Phone Unbalanced - Connector

    1/4" stereo jack

  • Output: Phone Unbalanced

    Maximum output: 300mW or more (32Ohms)
    Applicable load impedance: 16 - 600Ohms

  • Output: Phone Unbalanced - THD

    Less than 0.04% (at 1kHz)

  • Output: Phone Unbalanced-Freq. Response

    20Hz - 80kHz (+/-3dB, 32Ohms, 100mW)

  • Output (L,R): Connector

    RCA Pin (Analog output)

  • Output (L,R): Reference output level

    2Vrms (0 dBFS)

  • Output (L,R): Applicable load impedance

    Less than 10kOhms

  • Output (L,R): THD

    Less than 0.01% (at 1kHz)

  • Output (L,R): Frequency Response

    20Hz-80kHz (+3dB)

  • Digital Out: Connector

    Optical (square)

  • Digital Out: Format

    S/PDF

  • Digital Out: Frequency Response

    44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz

  • Digital Out: Quantization

    16, 24bit

  • microSD card slot Format

    FAT32 (for firmware upgrade only)

  • Compatible card

    microSD card (SDHC), up to 32GB

  • Power supply

    DC12V

  • Dimensions (W x H x D)

    150 x 34 x 157mm / 5.91 x 1.34 x 6.18" including protrusion

  • Weight

    630g / 22.22oz approx.

  • UPC Code

    636827306508

1 Accessories for Fostex HP-A4BL 4-pin XLR Balanced Headphone Amplifier & Dac

  • All Accessories (1)
  • Cleaning Accessories (1)
Dekoni Audio Headphone Cleaning Wipes, 10 Pack
Dekoni Audio Headphone Cleaning Wipes, 10 Pack
$6.99

About Fostex HP-A4BL

While maintaining the trusted legacy of its predecessor, the HP-A4, the HP-A4BL 4-pin XLR Balanced Headphone Amplifier & DAC from Fostex is a stylish and innovative solution for those seeking superior sound quality. This high-quality USB DAC and headphone amplifier is specifically designed to offer a balanced connection, a feature that is increasingly sought after by discerning audiophiles.

The HP-A4BL stands out in the market with its unique 4-pin XLR balanced output, a feature that is not commonly found in other headphone amplifiers. This reliable and durable device also supports DSD Audio up to 11.2MHz, ensuring that your music is delivered with the utmost clarity and precision.

Whether you're a professional audio engineer or a music enthusiast, the HP-A4BL 4-pin XLR Balanced Headphone Amplifier & DAC is a valuable addition to your audio setup, designed to amplify and enhance the sound quality of your headphones for an immersive listening experience.

Fostex HP-A4BL Features

  • 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

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Key Features

  • Experience superior sound quality with this Fostex headphone amplifier and DAC combo.
  • Enjoy versatile connectivity with balanced XLR and unbalanced headphone outputs for flexibility.
  • This headphone amp supports high-resolution audio up to 192kHz/24-bit for detailed listening.
  • Upgrade your listening setup with a headphone amplifier that enhances sound clarity and depth.
  • Achieve optimal headphone performance with impedance matching from 16 to 600 Ohms.
  • Compact and robust design ensures durability and fits seamlessly into your audio setup.

What's in the box:

  • Fostex HP-A4BL D/A Converter and Headphone Amplifier
  • 4x Rubber Foot
  • USB Cable
  • Manual
  • AC Adapter
  • Fostex 1 Year Limited Warranty