Hmm, so here's something. In Robert Harley's he says (page 409) that putting lead shot bags on speakers is a good resonance trick. I'm thinking right now of piling 10-20kg of plastic bottles full of sand or something like that on my M80s to make them heavier and dampen them out (at very loud volumes [ahem, 95+ dB], espeically deep bass these babies start to resonante and I have a quiet ear-based suspiction that mid-range starts to brighten up then but I was too lazy to pick up a dB meter yet). Whole idea came up after I was blown by african drums rendition on Revels (I think F20s) at my dealer's that I knew my Axioms could never get same way [ahem, the Revels were $20K+ a pair ;-)]. The Revels were 200 pounds or so each ;-) Any comments ?
