Can VPI bricks be used as isolation platforms - e.g., to be used as base support for amplifiers? If so, how effective are they?
The technical term for the Magic Brick is a Back EMF Damper. They are really designed to be put on top of gear.
That said, I have tried them under equipment and know several other audiophiles that have done the same. Other than scratching the hell out of the brick, it didn’t seem to do much...