Fostex HP-A8C 32-Bit Digital Audio Converter and Headphone Amplifier

Special Price $999.99 Regular Price $1,499.99
Ships in 10-14 business days

$0.00 Tax Outside NJ


  • 32-Bit/192 kHz Sample Resolution
  • Dual 1/4" TRS Headphone Outputs
  • Built-In x2 or x4 Up-Sampling
  • Built-In SDHC Card Slot for DSD Playback
  • Headphone Gain from 0 to -12 dB
  • Asynchronous Mode with TCXO Clock
  • Dedicated Remote Controller
  • Digital Filter Selection
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The Fostex HP-A8C 32-Bit DAC Headphone Amplifier is a high-fidelity digital-to-analog converter with a discrete analog headphone amplifier. With this DAC, you can listen to music on headphones or speakers from a computer over USB or from another audio source device. For inputs, the DAC accepts digital AES/EBU, digital optical, digital coaxial, SD cards via an SDHC card slot, or analog RCA. For audio streamed via USB, coaxial and optical inputs, the DAC can up sample the incoming signal by x2 or x4 at up to a 192 kHz sample rate with 32-bit resolution for Mac OS X and 24-bit resolution for Windows.


For outputs, the DAC features RCA line and two 1/4" headphone jacks


A button on the front of the unit allows you to turn the power off/on, and two knobs allow you to select the input and output sources. An electronic volume knob allows you to adjust the headphone gain from 0 to -12 dB in 0.5 dB step increments. A direct-out mode can be engaged to bypass the volume control knob altogether. For added convenience, the DAC comes with a dedicated remote controller

Built-in SDHC Card Slot for DSD Playback

The SD card slot can playback content in Direct Stream Digital File format (DSF)

Asynchronous Mode with TCXO Clock

To keep precise low-jitter time, the DAC utilizes an internal asynchronous temperature-compensated crystal oscillator clock


The DAC utilizes a large-capacity toroidal transformer power supply

Selectable Internal or External Clock

The DAC can utilize either its internal asynchronous crystal oscillator clock or be switched to sync via digital I/O to an external clock source such as from a separate analog to digital converter, a master clock, or a reference clock for syncing audio to video

Digital Filter Selection

To remove pre-echo from playback, the DAC allows you to select between a traditional sharp roll off and a minimum delay filter


More Information
Stock StatusShips in 10-14 business days
Mfr Part NoAMS-HP-A8C
Upc Number636827302456


Sampling Resolution

USB Port: up to 32 bit/192 kHz (24 bit on Windows) 192 kHz sample rate
32-bit for Mac
24-bit for Windows


1 x High Speed USB 2.0


2 x optical connector, square
2 x coaxial connector, RCA pin


Optical and Coaxial: S/PDIF


USB: 44.1 to 192 kHz
Optical: 44.1 to 192 kHz
Coaxial: 44.1 to 192 kHz
AES/EBU: 44.1 to 192 kHz 

Analog Audio Connector

RCA pin left and right


Headphone Outputs

Connector: Stereo Phone

Max Output

700 mW (32 Ω loaded)

Recommended Load Impedance

16 to 600 Ω


Less than 0.002% at 1 kHz, 32 Ω loaded, 100 mW

Frequency Response

10 to 80,000 Hz ±0.3 dB

Digital Audio Connectors

Optical, square
Format: S/PDIF


Power Consumption

24 W

Dimensions (WxHxD)

8.39 x 3.07 x 12.36" (21.3 x 7.8 x 31.4 cm)


8.26 lb (3.75 kg)


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