Mapeshade cable lifts or any cable lifts?

Yes, but very very little; the diff is extremely small. Still, give it a try using tips from Elizabeth, if the result is un-noticeable, go elsewhere. Perhalps, lift off Cdp and/or speakers using diff materials, instead.

When the cables are on the floor they are prone to the floor vibration in addition to other sources of vibration. Whether those cable risers will decrease it, unchange it or make it worse should depend a lot on those particular risers and their interaction with particular cables. Theoretically, the good ones should be able to improve the sound especially at high volume.

"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.