Fostex HP-A4 24-Bit USB DAC Headphone Amplifier

PA SKU # FTX HPA4 MFR # HP-A4 UPC # 636827304221
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  • Product Highlights
  • Up to 24-Bit/192kHz PCM Support
  • Up to 5.6MHz DSD Support
  • USB 2.0 Input
  • Optical S/PDIF Digital I/O
  • Front-Panel 1/4" Headphone Output
  • 2 Gain-Staging Levels
  • Selectable Filter
  • Mac & Windows Compatible
  • Includes USB Cable & Rubber Feet

32 bit Multi-Format Audio Converter D/A and Premium Headphone Amplifier

The HP-A4 24-Bit USB DAC Headphone Amplifier from Fostex supports PCM audio up to 24-bit/192kHz and DSD audio up to 5.6MHz. It features a front-panel 1/4" stereo headphone output, rear-panel stereo RCA outputs, and optical S/PDIF I/O. The HP-A4 has 2 gain staging levels, allowing you to boost the output of the amp by 10dB without needing to touch the volume knob. The selectable filter allows you to cut-off lower frequencies if desired. A USB cable and 4 rubber feet are included.
  • USB bus powered
  • Linear PCM audio up to 24-bit/192 kHz and DSD audio up to 5.6 MHz playback
  • High-resolution playback in combination with "FOSTEX Audio Player" software
  • HI/LO Gain selection (10 dB)
  • Asynchronous transfer mode using custom-made crystal
  • Digital filter with selectable roll-off and cut-off characteristics
  • Complies with USB Audio Class 2.0 on Windows XP (SP2 or later), Vista, 7, 8 and Mac OS X 10.6 or later
  • microSD (SDHC) card drive on the rear panel for future firmware updates
  • Input
  • Sampling Frequency: Up to 192 kHz (PCM)
  • Up to 5.6 MHz (DSD)
  • Bit Depth: Up to 24-bit
  • Connector: 1x USB high speed
  • 1x S/PDIF TOSlink (16/24-bit, 44.1 to 192 kHz)
  • Output
  • Connector: 1x 1/4" (6.3 mm) stereo headphone output
  • 2x analog RCA outputs
  • 1x S/PDIF TOSlink (16/24-bit, 44.1 to 192 kHz)
  • Maximum Output: 100 mW (32 Ω loaded)
  • RCA Outputs: 2 Vrms reference output level
  • THD: Headphone Output: Less than 0.04% at 1 kHz, 32 Ω loaded, 100 mW
  • RCA Outputs: Less than 0.01% at 1 kHz
  • Frequency Response: 20 Hz to 80 kHz +/-3dB (1 kHz, 32 Ω loaded, 100 mW, FS 192 kHz)
  • RCA Outputs: 20 Hz to 80 kHz +/-3 dB (at FS 192 kHz)
  • General
  • SD Card Slot: 1x microSD slot (for firmware updates)
  • Compatibility: Windows: XP (SP2 or later), Vista, 7, 8
  • Mac: OS X 10.6 or later
  • Power: USB bus powered
  • Power Consumption: 2.5 W
  • Dimensions (W x H x D): 4 x 1 x 6" (113 x 34 x 155 mm), excluding protruded parts
  • Weight: 17 oz (500 g), approximate
  • 1m USB Cable
  • 4 x Rubber Feet
  • Limited 1-Year Warranty
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