Purchase 2, 4" X 8" X 16" solid concrete blocks. You can spray paint these with the color of your choice. I would suggest trying your amps with different materials between the amps & the blocks. Cost for the blocks is $1.00 each. You will need two per amp. No time for preparation unless you paint them. These will have a definite affect on the sound of your amps; you will want to experiment what you use between the amps & the blocks. GOOD LUCK!
