Mapeshade cable lifts or any cable lifts?

... will decrease it, unchange it or make it worse...at high volume.

Agreed.

"Theoretically, the good ones should be able to improve the sound especially at high volume."
Inna (Threads | Answers | This Thread)

Many of these tweaks and "theory" should not be mentioned in the same sentence. They may or may not work, but there is almost never any theory behind them, or a huge stretch at least.
Same here. Cables vibrating? I don't think so.
Unless you're talking about the theory you conjure up in your own head. Then it makes perfect sense, theoretically of course.

Not to mention the static electric charge on carpets.

"Cables vibrating? I don't think so" I bet you don't think that speakers vibrate either.
"Quantum this or that". That happens too of course, but that's not what I was talking about. Elizabeth, you want something good for nothing; special treatment, in a manner of speaking. I can understand it; good luck to you.
Interesting thread anyway.