I started with Monoprice banana plugs. After a short time, I noticed they got loose from either the screwing together or the tip started to unscrew.
My choice was to try locking banana plugs, and I got them from Blue Jeans Cable. Theirs have twin set screws, but also a wide area between those where I can solder the connection. I had to get a more-powerful soldering station (60 watt) to be able to heat them up enough to flow solder, but it works. When you buy finished cables from BJC, they weld the wire in that same space.
I make NO claim that they sound better than the cheap Monoprice connectors, only that the connection is more secure. By contrast, the bare wire connection I have to use on my Atmos-enabled speakers (to reduce how far they stick out the back) do get loose and I have to snug them up occasionally. The speakers are KEF R50, and the binding posts are very good quality. They still get loose.
KEF R500, R200C, R100, R50, SVS SB2000 sub, NAD T758v3 AVR, LG UP875 4K BlueRay, Samsung UN55JU6500F 4K LED TV, KEF M500 headphones, Sony CDP-CE500 CD changer. Office: NAD M10, KEF LS50, KEF Kube 10b, Pro-Ject RPM1 TT w/ Ortofon 2M Red. Guest room: Hafler 300 L-R, KEF Reference Model 100 center, KEF iQ10 surrounds, modded M&K V-90 sub, Bluesound Vault 2.