I am a believer in resonance control thru the use of mechanical grounding. I do this in my own products offered for cello and bass and as product adviser for the predecessor and the now retitled Live Vibe Audio.
A few yrs ago after reconfiguring my Altmann DAC assembling a 12 chip DAC tower on a separate board it required a even larger 12 volt battery around 40 pounds. I used this set up for a few months. I am forever experimenting and decided to place the battery on a LiveVibe platform that was just alone in a corner.
I placed the heavyweight battery on the brass coupling discs and then the battery on top of this assembly. The battery is a totally passive device though one with a chemical reaction.
There was an improvement in sound of my system with the sleepy battery at slumber on top of the platform.
TomD