A concrete paving slab on top of a 4-6" foam slab is a remarkable isolation setup. The CD player is coupled firmly to the massive concrete block, and the compressed foam is unable to transfer any ground based vibrations to the massive concrete slab.
Oh, and it costs $10-$20. Low WAF, though. I use it under my rega planar 3 turntable with excellent results.
Oh, and it costs $10-$20. Low WAF, though. I use it under my rega planar 3 turntable with excellent results.