Inexpensive speaker cables

Check out my thread about the Cerious Technologies Graphene cables.

Clear day are very good.Paul is very nice...

As suggested above you need to try the Clear Day cables. Paul will not ask for credit cards or anything. He will simply discuss your system and ask for your shipping address. Cables will arrive in 3-4 days.
Just curious; what is the rest of your system?

Belden zip cord of appropriate diameter

after that, get something you can return and have a friend substitute it in (or not and tell you they did) in a double-blind test

you will be unlikely to hear a difference and if you do it will be different but not better

Belden 5T00UP from https://www.bluejeanscable.com/store/speaker/