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Cheap Speaker "Isolation" Solution for 300 lb. Speaker

 Good Afternoon All,

I am looking for advice on a cheap and simple isolation solution for large, heavy (325 lb. each) floorstanding speakers. 

I've read much advice on granite or marble slabs, multiple layers of cork, springs, etc; while this has been helpful, it is neither a cheap or simple solution. 

Ultimately, I am looking to protect my wood floor from damage these very heavy speakers might do, as well as decouple the speaker from the floor in order to reduce bass resonance (I am in an apartment complex and worry about noise complaints). I've looked into sorbothane pads, but they never seem to be able to hold this much weight.

Thanks!
scorndefeat
geoffkait's avatar
geoffkait
23,365 posts
 
The problem you face with springs is the same old problem - the springs need to be widely spaced, so that means you would need some structure to allow the springs to be placed in a wide pattern, pattern outside the dimensions of the speaker footprint. Otherwise the speakers will topple over. 

It is feasible to construct a large 3x3 CROSS that the speakers sit on with springs of the correct stiffness under the CROSS at each of the 4 corners. Tricky but feasible. That’s a DIY Townshend Podium. But something that heavy is dangerous on any support IMHO.
mooglie
101 posts
 
Washing machine anti-vibration pads?  They sure work on my heavy, high speed washer.  Cheap, too.
scorndefeat OP
16 posts
 
I agree with you, Geoff; beyond the complexity of building such a support for such large speakers, I'd have fears over their stability. 

The washing machine anti-vibration pads seem like a genius idea. They sure would be able to hold the weight, and while I'm not entirely sure what their impact on the sound will be, it's worth a try at the cheap price!
soix
8,640 posts
 
Seems to me that one of the simplest, easiest, and relatively cost-effective solutions to what you’re looking to accomplish would be Herbies Giant Fat Gliders.  If those alone don’t provide enough isolation, maybe consider adding Black Diamond Racing Jumbo Pit between Gliders and your speakers.  Just a crazy thought. 
jtcf's avatar
jtcf
1,589 posts
 
There are appliance dollys that might work for you.They are available in many sizes,wood,plastic,or metal.https://www.googleadservices.com/pagead/aclk?sa=L&ai=DChcSEwjll8am4_HmAhWChsAKHRVJDf0YABAdGgJpbQ...
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