discopants- A good experiment to try is play your system moderate volume and pinch the speaker cable going in to your speakers between your thumb and forefinger to feel the vibrations. Then use a 1cm wide piece of the thin tape around the speaker cable and try again you will barely detect any vibration.
The combined effect if used correctly through the signal path (I.e power supply to speakers) is super stereo imaging and lower noise floor.
Experiment! Love it! I'll try it tonight!
One of the greatest yet seldom mentioned benefits of tweaking is the way it forces you to listen and evaluate. Tweaks are misunderstood. Tweaks do not "make" your system sound better. YOU make your system sound better by using the right tweaks the right way.
My very first tweak was a phone book (remember those?) placed under my CD player. Had to strain and concentrate but the subtle improvement was there. Put another one on top, strain and concentrate and yeah, another barely perceptible improvement. Probably nobody else would ever notice, improvement so slight only probably only being intimately familiar with the system let me even hear it at all. Not putting it out there as a recommended tweak, that's for sure, but as a listening exercise. Because then later when I heard BDR Cones, WOW! Now THAT'S a TWEAK! And being already used to listening and evaluating so closely it was a wealth of new characteristics to work on.