Thank you all for your input and suggestions.
I have springs already, and the wood, and a frame that can be modified made of steel extrusions with connectors etc.
Yes I plan on isolating between the frame and the shelves, as it's a known efective solution.
The wood is a facade, covering up what will be the mechanical isolation using engineered springs. Steel plate has been used, laminated to MDF for the shelves in the past. I am looking to make the spring placement adjustable around the center of gravity. I'm trying to stiffen the wooden shelves, to reduce bowing or sag, and get it to within close mass to the shelves the springs were engineered for.
Building a custom isolation equipment rack
I’ve finally managed to get to doing something about an equipment rack for my system. Hoping to make a low level rack, with two shelves to keep it lower between the speakers. It may not be optimum, compared to having it out the side, but the idea that it is low enough to at least not be center of the sound field for imaging sakes.
I went and purchased $600 of pretty clear mesquite burl 1" boards (there will be minimal epoxy). And so I’ve already taken the saw marks off both sides, and I’m already down to 0.9inches thickness.
When I worked for Lenehan Audio in Australia, my mentor Mike made many isolation racks for equipment, laminating wood and steel plates and using springs.
I would like to incorporate the springs I purchased for that task under my two shelves. I have a weight goal for the mass loading of the springs, and I need rigidity, without adding too much more mass.
Steel was my first thought, but it would be both heavy and have a possible dielectic impact (okay so I’m possibly/probably paranoid).
I’m looking at using a honeycomb structure under the top to support it by laminating it with the mesquite, honecomb and then maybe carbon fiber?
Anyone in the forum worked with honeycomb or that sort of thing?