Other than the cost I can't think of a reason to try it. I use a maple block under my sub with excellent results. Liked it so much I put my speakers up on plinths as well. It worked well for me. In fact just the other day I switched back for comparison. There is a definite advantage with the plinths. Check my system page for a pic.
I believe the "rake" would mean tilt them back.
I believe the "rake" would mean tilt them back.