I'm using (3) Herbies Tenderfeet under my NuWave DSD DAC. Whatever footers you decide to use, I suggest using three rather than four due to the dimensions of the unit and to have minimal contact with the shelf.
On my Perfectwave transport I use 4 tall Tenderfeet with an Edensound damping weight over the transport.
On my Perfectwave transport I use 4 tall Tenderfeet with an Edensound damping weight over the transport.