Speaker Cable Management

Use PVC conduit. 

You could use split loom (plastic) and secure it with

https://www.amazon.com/s?k=split+loom&crid=2MEC15WVM71FW&sprefix=Split+L%2Caps%2C233&ref=nb_sb_ss_ts-doa-p_1_7

Cable risers mitigate floor reflections which are on one side.

Conduit is a metalized 360° "mirror."

The only way that you’ll know if you hear the difference is to try it

Why so ebm?

Not a very good idea.

I do much the same, but with my interconnects (for monoblocks).

You can get pretty anal about these things, but when it comes down to basics, I doubt you would distinguish a significant change in sound.

B