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In Reply to: RE: Maggie slap / Mylar Stretched. posted by Satie on July 31, 2016 at 13:17:46
Maybe you should define "high" pressure?
The transducer units have a "curvature" to them, and if any securing method aggressively removes that and/or creates a twist and/or creates a vice-like grip on any portion of the edges a user can run into problems.
I'm not sure many users are appreciating the forces involved here when fabricating different frames for their speakers.
Dave.
Follow Ups:
My favored approach is viscoelastic damping on one side and clamping with vertical Al or or wood "L" forms bolted to the wood frame in multiple locations along its length. That would be on the sides where there is no curvature. The bolts should screw to finger tight with the screwdriver and you can tune the spring loading from there by adjusting with extra torque..
Did you look closely at the sandwich construction scheme I used on my MMG's a few years back? It's a much preferable setup to your favored approach.
It provides coupling to both sides, very even tension across the full perimeter, requires less fabrication of special pieces, has no finicky screw tension to worry about, requires no drilling of the transducers, etc, etc, etc.
Dave.
Actually I don't remember it specifically.I will look it up.
Thanks
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