The Guru of 3D posted a review on the Auzentech X-Fi Prelude 7.1

Auzentech’s got another sound card, this time they’re using X-Fi parts. My torpor faded rather fast. For their next card Auzentech took the heart of the X-Fi and created a super-bionic X-Fi, the X-Fi Prelude. They have replaced almost every part of the original X-Fi and fitted it with upgraded parts all around the Creative’s CA20K APU. The digital-to-analog converters (DAC) are now high-quality AKM parts.

A wunderkind with family troubles, Auzentech's X-Fi Prelude combines Creative's X-Fi with high-quality components to create an uber sound card that not only sounds good, it also plays good. But, the X-Fi Prelude also shares the X-Fi's drivers, which loosely translates into trouble.

Auzentech X-Fi Prelude 7.1 Review