It's a Terratec Aureon 5.1 Sky. http://productsen.terratec.net/modules.php?op=modload&name=News&file=article&sid=148&menu=107 I paid a little bit more than 50 €. It can drive my Sennheiser HD 540 Headpones (300 Ohms) without problems, even when turning it up to insane volume I can't hear any noise. I'm very satisfied with the sound. (Currently I'm listening to some 24/96 jazz tracks, extracted from DVD-V, through foobar2000.) Hopefully I have enough time soon to perform my 24/96 vs. CD resolution test. Most likely I'll add some more test samples and re-do the tutorial (using some .bat files for easier cration of the test files etc.) FYI: There's a free tool called Rightmark Audio Analyzer http://audio.rightmark.org/ It can be used to measure soundcards' in- and output quality, e.g. frequency response, noise level, stereo crosstalk. There's also a forum where results for many good quality - high end soundcards are discussed.