@bdp24 an elegant implementation of the type of idea you are describing is the range of shelves and stands from Pro Audio Bono in Poland which use a patented string suspension. I like how they use guitar tuners to adjust the tension
http://proaudiobono.pl/?page_id=1204&lang=en
The top of line GPA Silverstone also suspends each shelf on a 10Hz resonant frequency mechanism
https://www.grandprixaudio.com/products/silverstone-series
http://proaudiobono.pl/?page_id=1204&lang=en
The top of line GPA Silverstone also suspends each shelf on a 10Hz resonant frequency mechanism
https://www.grandprixaudio.com/products/silverstone-series