ankkax

I Installed android radio on my skoda superb mk2 2009 and I noticed that the amplifier makes hissing sound trough speakers. I first thoud the problem was the android stereo, so I installed columbus radio back and noticed that it still has the sound I just never noticed before because I always had something playing. Now when I know it I notice it when the radio is on or when I set to aux output. I was wondering if my amp is broken or does every skoda has that problem? I attached the sound file to this post. If I lower the volume hissing goes down a bit but it is always there. hiss.mp3 OEM 3T0035456