Creative Sound Blaster X3 Hi-Res 7.1 External USB DAC & Amp Sound CardRaising the bar for your desktop movie experience, X3 comes packed full of features that promise the best cinematic experience at home, regardless of your preference for speakers or headphones. It is the world's first external multi channel USB DAC and Amp to feature our award winning Super X Fi technology, as well as 7. 1 discrete surround on speakers, 7. 1 virtual surround on headphones, and Dolby Digital Live.* Coupled with high quality audio