So I recently started using an Acoustic Image Contra, first series. This is an amp with a downfiring woofer and a forward facing mid. It is intended to couple with the floor and if you put it on the floor it has very strong low frequencies. But if I put it on the floor, the mid is firing at my calves. So, a thread over in bass guitar land made me think of a possible approach - Why couldn't I set a milk crate down on the floor, then put a piece of plywood on that, then put the amp on THAT? Wouldn't that do much the same thing as the floor, but 18" or so closer to my ears? I already use the piece of plywood on my folding two-wheeler. Any comments?