Apr 16, 2013 Written by: MarshallR

Xonar U7 USB Sound With Headphone Amp

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ASUS has just launched its Xonar U7 USB sound device with headphone amplifier. While not ROG branded, the U7 has very clear audio at 114dB SNR, partly thanks to its Hyper Grounding PCB design (that was originally introduced on the Xonar Phoebus) and a 32 ohm-150 ohm headphone amplifier built in to pump up the sounds to your (Vulcan or Orion) headset.

It features the same technology capacity as modern  internal soundcards with 7.1 surround sound audio and 192KHz/24-bit HD audio and the latest Dolby Home Theater v4 that can upmix all audio to 5.1 or 7.1 output and use Dolby’s expertise in sound control over Windows' own.

The U7 has dedicated microphone and volume controls, which means even if you’re using a PC or notebook for gaming they are close at hand and quick to use rather than fiddling with software settings. Being USB powered means that it’s easily disconnected and used for a multitude of hardware: use it with your PC while at home, and then throw it in your bag with your notebook when you head out. Its built in S/PDIF out means you can also easily hook it up to a home theater amplifier as well.

If you're after a new USB sound device and would like to know more, give us a shout in the forums!

ASUS Xonar U7 with box

Press Release

ASUS Introduces the Xonar U7 USB Soundcard and Headphone Amplifier

Compact USB-powered device provides 7.1-channel surround and high definition 192kHz/24-bit sound for desktops and notebooks


Taipei, Taiwan (April 15, 2013) — ASUS today announced the compact Xonar U7 USB external soundcard and headphone amplifier, which offers powerful and clear 114dB SNR audio with USB convenience. It incorporates a headphone amplifier, Dolby® Home Theater v4 support, plus dedicated microphone and volume controls.


Xonar U7 serves the needs of PC gamers who want to enjoy strong and clear sound via headphones, and is also ideal for listening to music as it produces much more impactful and detailed audio than onboard hardware. Connecting via USB, it requires no standalone power supply and works instantly setup-free with no need to open the PC case.


Powerful sound from a compact and portable device

While other USB audio devices leave out hardware features in order to maintain a small form factor and are typically only capable of 5.1-channel surround due to limited power supply, Xonar U7 engineering overcomes these constraints to offer strong and immersive 7.1-channel performance.

The signal to noise ratio, or SNR, stands at 114dB thanks to meticulous hardware design and component selection. Xonar U7 produces clear audio, driven by the high quality Cirrus Logic® CS4398 DAC (digital to analog converter).


Exclusive ASUS Hyper Grounding PCB fabrication ensures strong signal insulation to reduce distortion and interference, also known as component crosstalk.


Gaming audio advantage and music enjoyment

The integrated headphone amplifier allows customers to make the most of premium gaming headsets, exceeding the often flat and underpowered performance offered by onboard audio. With stronger headphone performance plus precise and pronounced sound positioning, players can hear opponents and game effects and events clearly. New Dolby® Home Theater v4 provides immersive surround and enhanced in-game voice quality. These contribute to more rewarding and realistic gaming experiences.


User-friendly design

Xonar U7 connects to PCs via USB. It also gets power directly from the USB port, removing the need for a power adapter. Combined with its compact dimensions, these turn Xonar U7 into a highly portable audio-enhancer that can be easily carried and placed anywhere.


Dedicated controls allow gamers to quickly adjust master and microphone volume without pausing games or going into software menus, ensuring uninterrupted action. The master volume controls double as a clickable switch for selecting between headphone input (front panel) and speakers (back panel).



ASUS Xonar U7 USB soundcard and headphone amplifier availability and pricing will vary by market and location. Please contact your local ASUS representative for further information.



  • 114dB SNR
  • 10Hz-46kHz frequency response
  • 7.1 channels  
  • 192kHz, 16-bit/24-bit sample rate  
  • 32ohm-150ohm headphone amplifier
  • 2 x RCA for front left/right channels, 3 x 3.5mm for side/center/rear channels, 1 x 3.5mm headphone out, 1 x 3.5mm microphone-in/line-in, 1 x S/PDIF coaxial out


Specifications, content and product availability are all subject to change without notice and may differ from country to country. Actual performance may vary depending on applications, usage, environment and other factors.

Full specifications are available at www.asus.com




About ASUS

ASUS is a worldwide top-three consumer notebook vendor and maker of the world’s best-selling and most award-winning motherboards. A leading enterprise in the new digital era, ASUS designs and manufactures products that perfectly meet the needs of today’s digital home and office, with a broad portfolio that includes motherboards, graphics cards, optical drives, displays, desktop and all-in-one PCs, notebooks, netbooks, servers, multimedia devices, wireless solutions, networking devices, tablets and smartphones. Driven by innovation and committed to quality, ASUS won 4,168 awards in 2012 and is widely credited with revolutionizing the PC industry with its Eee PC™. ASUS has more than 12,500 employees around the globe with a world-class R&D team of 3,800 engineers. Company revenue for 2012 was approximately US$14 billion.

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