The DAC Box DS2 Ultra is a true high-end digital-analogue converter with optimal fidelity & a wide feature set for use in almost any digital hi-fi system. Built around the premium Asahi Kasei Microdevices AK4490 DAC chip the DAC Box DS2 Ultra works with digital signals up-to 32-bit / 768k Hz & DSD256 (Do P). The additional AK4137EQ sample rate converter with Velvet Sound technology up-scales all signals to 768k Hz for minimal signal loss & enables the built-in filters (5 to choose from) & sound modes (3 to choose from) to have a greater impact. With this chip set configuration the DAC Box DS2 Ultra can deliver the same rich musical sound-field with accurate bass reproduction & minimal distortion as the superior Pre Box DS2 Digital.