Not suitable for computer audio systems

I plugged the extension cord with multiple 2.1 computer audio systems.
It was always the same result: a minimal blechener sound issued. No comparison to the original but just far shorter Käbeln.
To give an Ralationswert: a system was the Speedlink Gravity XE.

On the quality of the cable, I can not fault obvious.
Is it too weak for 10 meters shielded or are those audio systems in general for such lengths simply not suitable.?
On the other hand, if something is offered without restriction mentioned as an audio extension cord should be allowed to go out by the application.

By shipper I've never had problems.

The description of the possible field of application by specifying the screen values ​​would be desirable.

The cable can be handled sufficiently thick and thus also in 10 meters length.

Therefore it bekommte me two star.