While I won't pretend to have an ability to attribute sonic characteristics to any of the proposed construction techniques; I will make the following comment. Anything that increases the mass that does not have a corresponding increase in stiffness (high Young’s modulus) will result in an increase in the amplitude of deflection. In simpler terms, as stiff as possible, without unnecessary mass. Kevin Halverson
Shelf Material
I have tried so many different shelf materials, and some are better than others, but I feel like I am just spraying bullets that always miss the bulls-eye. So far, I cannot live with the brightness of glass, the ringing of marble or granite, the sluggishness of acrylic, the muddiness of mdf etc. Light and rigid seems better than heavy and dense - in that I can live with the downsides more easily. I use heavily constructed welded steel racks - spiked to the floor and upward spikes supporting the shelves - and I reckon this is right. I like the way bladder products get rid of the resonances that plague shelves, but find that the way they slow down the pace of the music is hard to accept. Does anyone have some answers on this?