From the 6moons preview:
"Starting in June 2012 with the new Home Reference Series, five models will have trickled down by October to build a high-value bridge between the existing NuForce desktop kit and famous Reference gear. Top to bottom in the right rendering is the $1.095 DAC-100, the $695 100wpc STA-100 amp, the $695 HAP-100 headfi preamp with three RCA inputs and the $695 UDA-100 USB DAC. Not shown until lower on this page is the final member, the $549 DDA-100 direct digital amp (or power DAC in Wadia speak). On styling it and the STA-100 are the odd men out without the two-tone stripe down the middle (and the DDA-100 also gets a different volume knob without line marker). On review today are the first two arrivals from this new crop, the DA-100 and DDA-100."