Sewell SoundBox, External USB Sound Card, 7.1 and 5.1 Channel Audio


Sewell Part # SW-29545

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7.1 Channel External USB Sound Card

Upgrade your desktop or laptop sound card with the brand new Sewell SoundBox. A 7.1 channel audio external sound card.

Ease of Use

Using only a USB 2.0 connection, this External Sound Card connects to your computer to deliver incredible external audio capabilities. You can also use the SoundBox between multiple computers without having to open up any of them.

USB Soundbox Connection Diagram

Digital and Analog 7.1 Channel Audio

This USB Sound Card supports analog and digital audio. It will support simple 2 channel stereo, and just as easily push out 7.1 channel audio. Instead of taking the time and money to open your computer and put in a PCI sound card, The SoundBox will turn your laptop or desktop into a home theater-ready audio solution.

Record in Stereo

The two microphone inputs provide a solution for any audio application requiring multi-input capability. The SoundBox supports 44.1 KHz and 48 KHZ sampling rates for recording and playback.


  • Small and compact for portability; about the size of a deck of cards
  • Full analog 7.1 audio through 3.5mm jacks
  • Digital 7.1 audio supported through Fiber Optic S/PDIF input and output
  • Record in Stereo through 2 Microphone inputs
  • Easy-to-use volume control buttons
  • Full-duplex recording and playback
  • Analog supports 48/44.1 KHz sample rate for both recording and playback (S/PDIF in and out only support 48 KHz sample rate)


  • Upgrade the sound card on your laptop or desktop to support full 7.1 audio, for games, music, movies, etc.
  • Record using full stereo
  • Turn your computer into a great Home-Theater PC
  • ...and Anything else you can think of


Mfg. Part Number

  • SW-29545


  • Sewell


  • USB 2.0 Compliant
  • Full-duplex Recording and Playback
  • SPDIF Optical Digital Input and Output
  • 3.5mm Jacks for Analog
  • Analog supports 48/44.1 KHz sample rate for both recording and playback (S/PDIF in and out only support 48 KHz sample rate)
  • Supports Windows 2000, XP, 2003, Vista, 7
  • *Windows 8, 8.1 (32/64 bit) - limited functionality 2.1 audio output only
  • *Mac OS with limited functionality (2.1 audio output only, only supports analog audio, no Toslink in OSX), no driver required for Mac OS


  • Drivers and Support pages available under the support tab

Package Contents

  • 1x USB Sound Box
  • 1x USB Cables
  • 1x Driver CD
  • 1x User Manual


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Does this external sound card decode dolby digital/dts on the optical in?


No, this converter is not Dolby or DTS Certified and cannot decode it.

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Could this product be the link between my blu-ray player and my Logitech z506 surround speakers? My blu-ray player has an optical output and my speakers have 3x3.5mm inputs for the 5.1 surround sound.


Unfortunately no, it wouldn't work that way. This converts USB sound from a computer to analog output, it can't convert a toslink to analog output.

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What is the output impedance at each of the the 3.5 mm phone connectors?


Front, surround, center/bass, and back output are all high-impedance ouputs, and can support high-impedance input (10Kohm) devices. The headphone output is low-impedance, and can support 32 ohm impedance devices.

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Driver Downloads

Windows Installer - For Windows 2000 / XP / 2003 / Vista / 7 (32 and 64 bit)

Driver - Windows 8/7/Vista/XP - Windows driver for Sewell SoundBox