The Predator is not only a very pleasant amplifier on its own, it also is a DAC. Getting the Predator working satisfactorily there was a bit of hard work, not caused, we hasten to add, by Ray Samuel's mini. The problem was with our PC equipment. Finding a USB port free of noise was not as easy as planned. With modern PCs bristling with USB ports, they are all derived from one source point on the motherboard and depending on the quality of surrounding electronics, fining a clear signal is not easy. With our Windows XP laptop, we found only one port that was devoid of white noise entering the signal. A new Dell desktop running Vista was remarkable quiet on all ports.