Back in June 2010
, I reviewed the DACPort USB D/A headphone amplifier and was very impressed by what I heard. CEntrance has since expanded their range of products, and at THE Show had a booth outside the Hilton's groundfloor ballrooms where they demmed a cute Audiophile Desktop system ($2000), which combines the MasterClass 2504 2-way coaxial speakers, the DACmini PX desktop amplifier and DAC, and a travel case.
Of particular interest to me was the newish DACport LX USB D/A processor ($299.50), which replaces the volume potentiometer with a fixed resistor divider. The headphone amp circuit now becomes the line output amp, resulting in an affordable USB DAC that can be used in a conventional system rather than with headphones.