@corelli
Seems like with the devices your using might just be changing the resonant signature of your cabinet with the rubber devices. The best vibration draining systems I have have used are ball bearing isolation devices under my components i.e. Symposium Roller Blocks, Aurios, isoacoustics Gaia’s etc.
If your interested in DIY route. You might want to search for "DIY Roller Blocks" or "Barry Diament hip joints"
Seems like with the devices your using might just be changing the resonant signature of your cabinet with the rubber devices. The best vibration draining systems I have have used are ball bearing isolation devices under my components i.e. Symposium Roller Blocks, Aurios, isoacoustics Gaia’s etc.
If your interested in DIY route. You might want to search for "DIY Roller Blocks" or "Barry Diament hip joints"