AudioQuest Type-4 - No Frills Build Speaker Cables, with BFA style banana plugs on both ends, from Audio Advisor. Relatively inexpensive, well built cables, with good, solid connectors.
This........Solid core speaker cables really tightened up the bass in my system. And at $109 shipped for an 8 footer it is a nobrainer to try.
https://www.audioadvisor.com/prodinfo.asp?number=AQT4NF&opt=474|492|494|498