No one actually knows how to lculate what speaker cable they need

If it looks like a 🦆 and it talks like a 🦆 and it walks like a 🦆 it’s probably a 🦆

My cables arrived today. They're beasts!

As suspected the forks won't sit in binding posts without an adaptor. I'm currently using banana plugs. Here's an image of the before and after cables: https://imgur.com/a/De0LmuG (credit card for scale).

I hooked them up and there's a definite improvement. The sound is more transparent. I need to listen more but I'm happy with this investment. I'm going to replace the bananas with some bolt on ones: https://uk.farnell.com/staubli/22-1053/banana-plug-50a-4mm-screw-m4/dp/1085560, that'll give me a better connection. The current plugs are on tight, but it'll be nice to get a stronger hold. The stiffness of the cables means that there's actually very little weight on the binding posts as the cables stand up straight from the floor.

Thank you b4icu. As you said to me, where else can I get that level of upgrade for that money.

I'm interested in getting another set for my centre now.

Compared to what?

My previous cables, Van Damm Blue 4mm, as in the picture.