Thiel Owners

Agreed upon. When going outboard with a Dunlavy modified crossover there was a gain in performance even more so when placed on a resonance grounding platform. Not a so called isolation platform as those trap and slow burn the exit of resonance. You want a nice quiet exit thru reactive materials with the proper conductive geometry as a tour guide to the exit. TomD

The floor interface is a complex problem, especially considering that each floor is unique and sometimes substantially different from other floors.

There is a method of material coupling where the collection of resonant energy is transferred to a large disc of the same material effectively increasing the surface area many times. And if you have 3 or 4 these devices then you effectively have the same shelf or floor surface under each and every component set up this way including the speakers. It works. TomD

FWIW, I would place outboard crossovers on shelves in the rack.

Unsound - that's a complication I hadn't anticipated. Wire is highly reactive and susceptible to noise from multiple causes. Having long runs between the XO and speaker would require specific engineering to maintain target performance.

I've become a big fan of shortest practical speaker cable runs via a pair of amps part-way between the centered source rack and speakers, with XOs part-way again. I've been presuming 1/2 meter umbilicals. Could be a meter.