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Fostex HP-A4 DAC/Amp - Personalize Your Sound
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fostex hp-a4 dac amp front panel

Fostex HP-A4 DAC/Amp

by Fostex
$399.99
Product Page Features
  • 365 day returns
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Fostex HP-A4 DAC/Amp - Enjoy Stunning Hi-Res Sound in A Premium Package

The Fostex HP-A4 DAC/Amp is all you need to experience flagship high-resolution sound. With its USB-powered operation, built-in Digital Filters, and support for hi-res playback, the HP-A4 will bring out the best from your gear, so you can discover new details in music you've never heard before.

 fostex hp a4 dac amp front panel view

What's In The Box?

  • Fostex HP-A4 24-Bit USB DAC Headphone Amplifier
  • 1m USB Cable
  • 4 x Rubber Feet
  • Limited 1-Year Manufacturer Warranty

The HP-A4 is USB-Powered for clutter-free connections

Most DAC/Amps rely on a separate power source to operate - not the Fostex HP-A4. With its fully USB-powered operation, you can enjoy great sound without the annoying cables.

Plug in the HP-A4 to your PC and enjoy high-resolution audio playback on your favorite movies, music, and games.

 fostex hp a4 dac amp back panel view

The Fostex HP-A4 supports high-resolution audio formats so you get the best out of your music

The HP-A4 is a true hi-res audio DAC/Amp, boasting support for Linear PCM up to 24bit/192kHz and DSD up to 5.6MHz playback, so you don't miss details in your favorite tunes.

Plug in using the USB input and enjoy high-resolution sound instantly on your PC or connect to the built-in S/PDIF port and play back your audio files at up to 16bit 44.1kHz or 24bit 192kHz. The HP-A4 also supports RCA Stereo Input, so you can add a dedicated amplifier to your audio setup for an even more engaging listening experience.

fostex hp a4 dac amp front quarter view

Built-in Gain Selector, so you can driver a wide range of headphones and IEMs

The HP-A4 DAC/Amp is specifically designed for headphones. With the built-in Gain Selector, you have enough juice to power your headphones to their full potential.

Switch between Lo/Hi output mode instantly and find the right sound for your headphones or IEMs. The HI Gain mode offers up to 10dB of extra volume, so you can hear every detail effortlessly.

fostex hp a4 dac amp next to headphones

Built-In Digital Filters so you can fine tune sound to your preferences

The Fostex HP-A4 lets you experience your music your way. Play with the built-in Digital Filters and adjust the sound to your preferences.

The HP-A4's digital filters alter roll-off and cut-off characteristics, so you can switch between a natural or precise presentation on any source.

 fostex hp a4 dac amp front view on white background

Fostex HP-A4 Specs

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)

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 bus 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

Shipping is FREE on all orders to customers within the USA.

We don't want to mess around with fine print and extra charges. We like things to be simple and easy. 

Here's how shipping works around here:

  1. Place your order
  2. You'll receive a confirmation e-mail. This means we've received your order and have pre-authorized your payment method.
  3. We check the stock levels on your product.
    • If it's available, we'll get it shipped within 3 business days.
    • If it's not available, we'll reach out by email and make alternate arrangements.
    • If you placed a pre-order, we'll keep you updated by email on the status of your order.
  4. You'll receive another email with shipping/tracking information.

Learn More

We get it. Audio gear can be subjective. That's why we offer our industry-leading 365 day return policy. Here's a quick rundown;

  • 365 Day Returns, for ANY reason.
  • ZERO Return Shipping Cost
  • You will receive your hard-earned money back in your pocket, NOT store credit.

Learn More

We get it. You've got a lot of choice when it comes to online retailers. Here's why we think you should shop with us at HiFiSoundGear.

  • 365 Day Returns. Not happy with your product? We'll buy it back.
  • Free Shipping in the USA. No extra charges. Ever.
  • Price Match Guarantee. We'll beat another authorized dealer by 5% for the best prices online, guaranteed.
  • Zero Shenanigans. If we can't help you, we won't pretend like we can.
  • Old-School Service. We pride ourselves on the best service, anywhere.
  • Your Satisfaction Guaranteed. We handpick our products for quality, and we know you'll love them. But if there is ever something wrong, we'll fix it.
  • No Taxes (Except in CO) We're small enough that we don't need to charge taxes on your orders in any state but Colorado.

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