cables with high copper content is better in transfering any signal better than other alloys copper only is best i work with very long cables when installing satellite systems and sound some cables the good ones have verv low resistence the bad can make an 8 ohm speaker measure about 25 ohms with 20 m cable that means power is lost and it sounds slower and dead cable loss or attentution varys with temperature hot days **** sound cold days better try it 4 ur self lay 30m cable on ur roof and test on cold and hot day and hear the difference i know the roon has aircon but some times cables run in the cieling no air con there now we know more mate pure metal is good what cable did u make anyway and how