I used mdf and screwed through it 8 3" brass screws using the tips of the screws as "spikes" then placed a litely inflated 12" intertube with another piece of mdf, sand bags, my dvd player and more sand on top. Works well and can be made for $20 from supplies ate home depot
"sandwich" platform for amps
I want ot build a "sandwich" platform for my monoblock amps. I undrstand a "sandwich" approach is best, that is, maybe 3" of acoustic foam layered between either mdf or maple wood shelves. Where dos one buy acoustic foam, and what kind is best; I know it must be very dense. Thanks, larry