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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Disagree with Superballs

The problem with superballs as isolation is that they are effectively elastomer "springs". They absorb that energy quickly, but they very efficiently put it back into the system! It's a rubber pogo stick effect, which is what always made superballs so entertaining to kids (and big kids). It's NOT what you want.
What you want is a substance that absorbs that energy and dissipates it rapidly, rather than putting it back into the system. In other words ZERO bounce back if possible.
I used Norsorex (dead, sad balls)to very good effect where isolation was wanted. Herbie's balls, footers, etc. also do a highly effective job. I didn't like Sorbothane, but this is individual taste.
The best advice will always be, as you said, that it's idiosyncratic to the system/situation. So experimenting with combinations of coupling and isolation is in order. And besides, that's half the fun of this hobby.


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