Bi wire, bi speaker/amp

I forgot to add, that Cleeds offers another route to using vertically stacked amps- an active crossover. But, that would mean you aren't hooking up to a speaker with upper and lower binding posts- In which case the crossover is within the speaker.
B

Here's a very good read, although technical to a point, which explains the very good benefits of bi-wire connections!
https://www.qacoustics.co.uk/blog/2016/06/08/bi-wiring-speakers-exploration-benefits/

Thank you!