Hiho….I have a question….I used to install an old MP3 radio from roadstar (yes, how gruesome I know…) until I saved enough for a new sweetheart…..but when I started to give gas, I had funny buzzing (or whistling), which gets louder with increasing speed….what could it be? it never had before with the radio….as soon as you step into the coupling it disappears….as soon as I turn off the radio… So it’s definitely coming out of the boxes…but… WHY??? does that have something to do with the in-vehicle voltage or something? hope someone can help me….