Constrained Layer Composite that works. Refined Second Generation Technology for enhanced vibration damping and lateral stiffness.
When compared to LDA wafers, blocks add a 1 mm thick layer of aluminum, an internal layer of maple along with more viscoelastic material. Of subtle importance is the layer of viscoelastic material on the top and bottom surfaces.
Blocks are particularly useful when placed under heavy amplifiers, speaker stands with spikes, and under turntables.
Blocks are called Entropic Isolators by Les Davis Audio.