The Bel Canto uLink is one of the best USB converters out there, especially among the units that do not need a separate power supply.
Supports sampling rates up to 192kHz. The uLink has a standard USB Type-B input and its main output is S/PDIF. That output takes a BNC connector for the digital cable, the best kind of connector. And also included is an adapter so you can use a cable with an RCA connector. In addition, of special interest for Bel Canto fans, the uLink has a ST Fiber output.
* High Speed USB type-B receptacle
* Coaxial SPDIF on BNC 75Ω
* LightLink ST Fiber
Supported sampling rates:
Supported word lengths:
* up to 24-bit
* Native MAC USB 2.0 compatible on OSX 10.6 and later
* Custom Windows USB 2.0 driver Win 7 and XP
The uLink I'm selling is in its original box, in pristine condition. Sells new for $675
My price is $350, plus shipping (but I'll cover the PayPal fee).
Some photos here, some reviews linked here, and questions quickly answered.
Absolute Sound review
Audio Stream review
Computer Audiophile review
Dave, who says his overbuying can become your great deal