The source will matter ? Thats just a excuse for you lol I tested multiple different cables from different sources and there is no noteable differences, also saying something like pure silver sounds brighter is complete bs, measurments show that there no differences in treble! I obvsly cannot change you but please test without knowing what u use, you will not notice a differences, at that point you just waste money! I tried multiple different sources from stuff like a Schiit stack too really expensive stuff like the Sennheiser amps and there was never a differences in terms of sound colored by cables