Wife stepping on speaker wire

Buy her some very high heels and usually one good ankle twist does the trick.....would have been a great gift today. Try flat cables or put a throw rug over them. PT

I would not ever leave any cables in contact with floors, I would suggest relocating the speakers so you can keep the speaker wire off the floor.

Be a man about (even at the risk of a marital dispute) and tell her how much those wires she's stepping on cost. Or, you could just raise the wires a few inches off the floor, with either home made supports or any of a number of commercially made cable supports as many dealers and cable makers advise us audiophiliacs to do.

Is there an consensus as to whether SC lifters make a difference
I've never detected any on wool or synthetic carpet or wood floors. A bit on concrete though but still not night or day.

Schubert, I don't know what SC lifters are, but I find porcelain isolator with glaze are clearly best. I have yet to find a cable including power cords that is not improved by being isolated. Furthermore, one per cable is best.