Akai S1000 / S1100 samplers

Hi, Mario, and hi to all yahoo s1100  group!
well, i have the same trouble with akai s1100 - the sound, played via s1100, or sampled onto s1100 is distorted - pretty big digital distortion, mainly on high freaquencies.
Here's some examples:

http://soundcloud.com/fornetti/s1100-vs-s950 a program for s950. pretty good sample floppy from korg m1

http://soundcloud.com/fornetti/s1100-vs-950-sampled - pretty quick sampled kraftwerk's track House phone. Also, first recording is my new 1100, second example is my old s950

Mario, did you resolve this problem? Maybe anyone knows?
Many Thanks,
Boris