Pros: good clean power, usb-spdif bridge
Review here: http://www.head-fi.org/t/626851/review-nuforce-icon2-s-x-speakers-w-1-sub-lps-power-supply#post_9011780 Summary: I have the fully upraded version, the LPS-2U-192k. This unit sports dual DC outputs and a usb to spdif bridge (outputting optical and coax simultaneously). The price may seem high, but keep in mind this is essentially three devices in one. The performance is very good, and improvements in sound are noticeable both with my Icon2 and HDP. It is also not limited strictly to Nuforce devices. The output is configurable between 12V and 15V via a jumper inside.