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Re: Speaker Isolation

Fatcobra,

Can you please explain the reasoning behind what you've done ... I'm afraid I can't see the logic in it?

1. You said "this gives near ideal point-to-point rigid contact >>paver to floor [isolation]".

I would say, yes, you have great point-to-point contact because you seem to have spikes from speaker to concrete paver and then spikes (because that's what the screws are acting as, even if they do have round heads?) between paver and wooden floor.

So in what way are you getting any "isolation"?

2. You said "... reduces vibration by coupling a heavy, porous mass to the speaker".

Yes, the concrete paver is coupled to the speaker but:

a) what vibration does this reduce ... from the speaker down into the floor or from the floor up into the speaker?

b) what is the significance of "porous" ... I can't see why this affects vibration transmission? Surely it's the fact that a concrete paver does not ring - like say granite or marble does - which causes it to be good here. Slate also does not ring ... or is this property of low resonance the result of concrete and slate being porous?

3. If you want to couple a heavy porous mass to the speaker, why not simply put the speaker on a sandbag ... or build a sandbox and place the speaker in it? (You wouldn't want to have a cat in the house, if you did this, though! :-) )

Regards,

Andy


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