hi, have my cable laid separately just as dad it has always preached only in a small place is the power cable times 10cm away from the cinch cable, the length is maximum 5 – 10cm. I have a very quiet lima whistle, you really only hear it when no music plays and I think it comes from it. Could of course also be the millions of original cable trees lying next to the cinch cables… but now on the subject, it would have to be possible ‘somehow’ the signal cable night Roughly shield against EM interference (only stops at the point where it is so close to the power cable) will try if with a few lying alu foil goes away (only for testing) if not have to use higher quality cinch cable.