Can foam padding isolate better than spikes?

I've used tubular polyethylene foam pipe insulation with temporarily great results. I would cut about 2 inches off the end of the tube and turn it on its side and place it under each corner of the speaker (20 pound monitor). Unfortunately, the weight of the speaker crushed some of the air out of the thin-walled closed cell foam within a few days, ruining its effectiveness. I also tried using it under each corner of a CD player with somewhat better results. Before the foam was crushed flat and lifeless, it seemed to drastically reduce noise floor and improve low-level detail. It seems to provide a fantastic suspension... for a few days. picture
I'm curious about how well that swimming pool toy foam tubing stuff would work. It seems like it would stay springy for much longer.

Has anyone tried using small sandbags as feet with any results?

Home Depot is a treasure trove for all these "McGuyver" tweaks.

Check out Herbies Big Fat Dots and their other options.

Thanks for your responses. Yes, it is fun trying all these unusual tweaks and decoupling materials but the bottom line is what sounds better.

So spikes get rid of resonances quickly whereas decoupling materials allow the resonances to remain until they dissipate on their own, it seems.

Enjoy,

Sonicray

It seems alot these days,cheers,B