Hello, you don’t mention the length required, but for short or long I recommend
Audtek OFC copper from Parts Express.
https://www.parts-express.com/Audtek-SKRL-10-50-10-AWG-OFC-Speaker-Wire-50-ft.-100-028?quantity=1
we will see if my link survives.
I have made many speaker cables with this wire, and would get the 10 gauge as it is so reasonable. It is easy to strip and labeled to keep + / - phase correct. It comes in various length spools. They also have good assortment of heat shrink to dress up the terminations. Good luck! Ken