Thank you for your responses. My story… for kicks, The day before I posted this question I watched Paul’s video on should we keep wires apart… in it he sidetracked to say that we should keep them off the ground… because the ground is, well, ground… This made excellent sense to me, way way more than people saying they do it because of vibration… So I went to my shop and grabbed a load of wood bits, raised the wires and sat down for a listen, but before I even reached the chair my brain was saying, ‘no way…’ . The difference was kinda epic (my floor/building is concrete). The excess bass went away, the highs gained air… etc etc…
It was such a huge change I had to take down loads of acoustic treatments and kinda re-evaluate for this new sound.
So I woke up early and went to the shop and made littel stands, I cut out notches in 1x3 pine scraps and put them on bases… they look like little Cacti… at the same time I thought I would be clever and twist up the pairs of pairs… installed it all and sat for a listen… it was, er, different, I got it to sound OK, but it seemed to be back where I started before raising the wire off the floor. So after posting this question and before any responses… I concluded the twisting the pairs of pairs was choking the signal and took them out and untwisted them and put them back in… big change… excess bass returned to tight bass inn ballance, highs returned etc… So I spent a few hours trying different acoustical solutions and got that going on again.
So, moral of my story is… keep the speaker wires off the ground, and don’t twist 'em up. Kinda thinking I might want to un-sheath the wires and un-twist them from their factory state.
Thanks for your input.