So, I know there’s a lot of noise here, but I just don’t find it. So this is the problem. As always, as long as the car is off, there’s no problem. As soon as I light the car, there’s a noise (whistles) that gets stronger with the speed. I’ve moved Chinch left and current right – so this error is already excluded. Mass points I’ve also tried many different things (also on the battery). I also tried out two interference filters. This makes the whistle quieter, but it is still there. And besides, you have a nice sound quality. I have already tried out a new endtsufe, new speakers and new cables – without success. My next problem is that when I turn off the radio and pull the ignition key a loud “PLOPPEN” comes. In addition, it is to be said that this comes only since I have the new power amplifier in it. Me in third and last problem in this area is that I hear everything that the radio does also through the LS (read CD – next track…) Also I hear my windshield wipers… I’m going through slowly and I’m about to buy another car. Hope you can help me. But please don’t be so incomprehensible, I’m not so trained in this topic. Who can help me with this problem is my personal car hi-fi god 😉 Thank you in advance! Oh yes, the noises etc. are just in the hench system, front is garkein problem. Even the bobbing comes only when the hench system is connected.