"Switching over to the S/PDIF input the system was quite magnificent! Almost
all of the "hissing" or white noise that I had noticed when using the analog
inputs simply vanished. The little 3" drivers were very clear though the
mid-range and reproduced highs a lot better than I thought they would be able
to! The soundstage presented by the little satellites was quite spacious, not
requiring a lot of fidgeting around to find "the sweet spot"."
FULL STORY @ HARDCOREWARE (http://www.hardcoreware.net/reviews/speakers/altec_lansing_acs56/1.htm)