Black ravioli pads combined with oak cones works well for me for component vibration control.
Fo.q tape from Japan very cheap and effective for vibration control get the thin tape 0.3mm and the thicker 2mm tape. One pack of each , buy directly from Japan for about $30 a pack.
Has multiple uses, I have it on power cables, speaker cables, plug sockets, around iec inlets, equipment chassis and pcb (be careful not to short anything). I also have it on capacitors, speaker driver chassis and a few other places. Very good value for money.
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.
There are threads on here about the use.
Keep on tweaking
Disco