I have made my own rack, machining stainless steel 4cm dia spikes + screws on top, copying a basso design.
Tried 4cm thick solid wood shelves for two years. It does affect the sound vs the floor or just a whatever stand providing better vibration isolation. Just switched the shelves to 3cm thick cnc machined acrylic. All i can say is wow, that is a much better "dampened" material than wood, or at least for my system. It became quiter and rounder. Racks do matter for sure.
Tried 4cm thick solid wood shelves for two years. It does affect the sound vs the floor or just a whatever stand providing better vibration isolation. Just switched the shelves to 3cm thick cnc machined acrylic. All i can say is wow, that is a much better "dampened" material than wood, or at least for my system. It became quiter and rounder. Racks do matter for sure.