Very poor or no sound!

I bought to my headphone cable to extend this extension cable in my amplifier. However, we heard absolutely nothing. Later I tried to connect it to my cell phone and on my headphones but the sound was very very very bad. The singer could not hear, for example, Gar and the bass has also sought in vain. Then I even tried using the cable box on my computer verlängern-> the same result. So if you want noise Meissen be money down the drain is at the right address. 1 star, Thumbs Down!