Fostex
Fostex PC100USB Volume Controller with USB DAC
List Price: 53(GBP)
Model PC-100USB is a high grade version of PC-1(W) that converts USB digital audio signal to analog signal to feed to powered monitor speakers such as PM0.4n PM0.5n etc. for high quality reproduction of computer audio . The volume for the left and right monitors can be controlled simultaneously at your handy position. It also offers a headphone out (stereo mini) for head-phone monitoring.