I remember a while back John Casler placed weights on his RM30 speakers - there's a picture of it in his Gallery (I've searched for a thread on this but couldn't find it):
http://www.audiocircle.com/index.php?action=gallery;image=2102
I'll be trying out Symposium Svelte Platforms under my RM30Ms very soon and I thought I'd also try the weight idea. All I have at the moment are four stone slabs weighing around 7Kg each.
What amount of weight should I use and what sort of improvements are possible? Is there a negative side to this? Stone slabs aren't the most attractive things so if I do find benefits should I use training weights, or something else?
Some people also use weights on their gear too. My amp, CD transport and DAC each weigh around 25Kg but I tried a slab on my 2Kg equaliser and thought there might have been a slight bit more percussion - maybe wishful thinking!
Funny you found these old posts, but there was a method to the madness.
First I mostly used rubber coated Barbell Plates since the rubber coating is better at damping and they don't ring, like solid steel.
They also don't scratch surfaces.
The reasons for the weights are:
1) Add mass to reduce reactive movement from the drivers, especially the woofers
2) Damp the cabinet from other vibrations and resonances
The benefits might be:
1) Improved transient bass response
2) Less cabinet talk
Fun to play with and the level of improvement (if any) will depend on many factors.
