From what I know it's official name is a "Line Output Converter" converts High to Low that removes that buzzing or hissing noise. You just need to find that fits the Euro. That SHOULD get rid of it, or minimize it to almost not noticeable.. but don't quote me 100%, I'm sure there's other on here that could double check. My system only really had this issue after the XCarlink install, never really had it before then... well, I never noticed it till now haha