It’s a good question. You’re showing 4N silver cable I think, but better silver goes up significantly in cost that'd obviously drive the cost of those cables up a lot. I have this theory that manufacturers largely use copper cables/interconnects to voice their products so when consumers use silver cables the increased level of information can become too much and as a result sound a bit bright. I personally use silver interconnects but Acoustic Zen Satori shotgun bi-wire cables that are copper. I reviewed Voodoo Ultralinear silver speaker cables in my system 20 years ago and found them to be excellent if a little less robust sounding than my AZ cables, but for someone looking for more detail/air their cables would be a great place to look.