Sound quality is very good, quality cable defective

Prior to a 0815 cassette from hama Laden had ausm, was relatively satisfied but I knew that the quality could be improved. So looked on Amazon, compared recessions and ended up with this one.
Ordered, come quickly, tried and completely satisfied. Clear, quality does not come to an mp3 not ran, but it's just one of a cassette.
Now after 1 week I run into trouble. When I move the cable can hear a crackling. That I did not expect happened so fast, even though I really just my phone once when entering and when exiting ausstecke.

Too Bad.