Power supply is one of the most important part in your system. Imagine “electricity” as “food” for your system. Good food = good healty = good quality. So, electrical cable is important in you audio system to.
I just got this trick few years ago from my friend. He offered me a power supply cable with ferrite clamp on one side of the connector. Since that was cheap, so I grab some. Within next few days, I built a power supply for my D/A. I upgraded the cable with this “ferrite clamped power supply cable”. Well, the sound became warmer, less bright, and better separation.
Also you can have a ferrite beads and wind your power supply cable few times in and out of the ring. You can try for signal cable to, give it a try! Fell yourself the improvements!