Wires are tone control, there is not way around it, its just the physics of cables. To tame the brightness try to find some cables that have conductors of larger diameter than the cables your are using.
Cables to settle brightness
Any suggestions on a cable brand for interconnects and power cables to settle down some brightness?
I have Wireworld at the moment which I might send back.
As I move up the food chain in my system it is getting higher resolving but the treble has gotten a bit forward for me.
I added a PS Audio PowerPlant which is greatly improved the SQ, but now the treble is a little too much. Now it might settle down with burn in, but I’m not sure.
Any suggestions?