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

I ordered mine and they came in slightly cheaper than I was expecting, £125. They're being cut and crimped this weekend and will be shipped to me on Monday, I should have them hooked up at the end of the week so I'll report back with images.

May I ask from who and what did you order? Fully assembled? Can you provide a link and how they will be terminated? Thanks.

I ordered them from chameleoncables on ebay:

2 of these: https://www.ebay.co.uk/itm/192412561182
And 1 of these: https://www.ebay.co.uk/itm/192044378960

I spoke with the shop owner and he's going to cut the cable into 4 x 2.5 m lengths and terminate them so I have four black ends and four red ends.

I might need to use a reducer or a termination block to connect the binding posts, but I have lots of room so it might fit directly.

Nice choices.  Let us know.  I saw those same spades and they should works nicely. If to big or bulky to fit, then you can buy spade to banana high quality connectors.  

Do you have a link to those adaptors? I don’t think I came across any.
Nevermind actually, I googled. I might already have some bananas that’ll work.

My plan is to bend the spades back by 45 degrees to give myself additional clearance if needed. it’ll be interesting.