With the success of the USB DACS and the wealth of technology there we created a new site just for this, USBDACS.com.
Please click on the BRICK below and you will be teleported to the new site with all the new information on it.
The USBDACS.com site has all the pricing, setup and information for the Brick, Proton, Cosecant and Crimson DACs. This is the only place for that information so going there will answer all your questions. These are only USB DACs, they do not include any SPDIF connection internally or externally they are optimized for USB connection only.