For 10audios, it seems likely to be another case of sh!t in-sh!t out.
Any Nuforce owner with any doubts about Nuforce's neutrality, speed, dynamics, inner whatever needs to belly-up right now and invest in Black Noise filters. Like any amp, Nuforce amplifies garbage too, so clean up the source and be happy! It about ain't warm, cold, this or that -- just treat yourself to the naked truth and forget about your amps once and for all. Jeez Louise, Nuforce amps are an absolute steal for there price/performance ratio, but you need a low noise-floor source to really delight in them.
-E