thank you very much for the link! Now I know what is meant by a degaussing coil and how it isused. Sounds rather easy. Actually (for no particular reason except my imagination), I just imagined a degaussing coil to be some sort of grounding device that is attached to the back of the picture tube or some other "dangerous" area of the monitor. But THIS really looks as safe as going into a club (the ones that play loud music) with industrial grade hearing protectors! COOL!
Maybe I could also use it for my TV which has a yellow spot on the left and a blue spot on the right from time to time, sadly it just had a new problem about minutes ago. It displays a bright green picture and then turns off by itself. I feel like my appartment got electrically cursed - I can't really afford a new TV at the moment *sigh*
To answer your last question: Yes, there is a speaker near the monitor (over it), BUT it is a shielded PC speaker in it's original shielded case. AND there is another one on the other side causing no such distortion. AND the distortion stays when I put the speaker away or turn it off (already thought about the speaker being the cause). AND I think, the distortion already showed before I had the speaker shelf in place which means it already showed, when the speakers were placed significantly away from the monitor.