stereoman said:
Hello. Have you practiced with elevating the speakers/power cable off the floor ? Does it really work and what exactly is the science behind it...is it necessary to elevate them off panel floors ? I think it makes a bit of a difference.
The electrical parameters describing the behavoir of a cable (resistance, capacitance, inductance) are all a function of the cable's physical dimensions and construction. Change the shape of the cable (by bending or vibrating it for example) and there will be small changes to its electrical performance. This is true of any electrical component and explains the 'microphonic' effect found in some amplifiers. Properly set up, a cable can be used as a poor man's microphone. Equally, the capacitance and inductance of a cable can be altered by its proximity to other materials - this is particularly the case with unshielded cables like speaker cables.
So, if there was an argument for supporting a cable it might have something to do with reducing the capacitive effect of the interaction with the floor, but a counter argument would be that a cable strung between supports would vibrate more than a cable damped by resting on the carpet.
In truth these effects are real, but at audio frequencies in a typical home hifi setup are tiny. Measurable, but completely inaudible. If using these products changes the sound in any way, it more likely that you disturbed a plug or connector possibly improving the connection. To be honest, my best guess is that our old friend 'suggestion bias' is the root cause of the change you heard. Real to you, but no change in the sound out of the speakers.