I buy 2 cables for NAS-router and router-mediaplaer. I-ve changed some Silent Angel CAT7 cables without silver. The sound is much more detailed and clear. The lower freqv. don't cover so much the medium and high freqv. So the sound is much more fine and detaliled. I strongly recommand! On digital silver is better than cooper. On analog cooper is better than silver. On analog signal is bettwen 20-20khz but on ethernet is much higher so that is why silver is better. Music has more dinamic sound.