Hi Dean Don't mean to butt in here.. Just want to point out that it seems like you are mixing two very closely related subject areas. The one is the degree of stiffness and the degree of mass in both the treble and the bass regions... the other is the actual ratio of stiffness to mass in each area. It is this last you seem to be getting tripped up on. The rest of what you have stated seems pretty much in line with what I understand Del to be saying. Cheers RicB >>Where's the analog in a piano if the bass soundboard is stiff? The analog is either the tapering of the panel near the edges, tapering the ribs near the rim, routing a groove around the perimeter, or floating it, or perhaps some other yet unknown process. Dean
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