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RE: Yet another problem room..

You know, being old and senile, I'd forgotten that, but when you mentioned it, it came back -- I do remember when you did those impulse tests.

Who was it who mentioned aluminum angles? I think I'd try steel angles, they're more massive. I think they'd complement the MDF well in that they have very different resonant characteristics and would damp one another more effectively than MDF and wood. And there's less of a risk of diffraction. One of the problems with measuring impulses in a circumstance like this is that you never quite know what you're measuring -- reflections, resonance, diffraction.

Really, there are a lot of beautiful frame projects, but I haven't seen any experimentation with Apogee-style truncated pyramids, rounded edges, or rounded profiles. Someone did some measurements of various baffles using the RD-75 and the one that worked best was an airfoil design. The big Infinities/Genesis for example use curved baffles to minimize diffraction. Also, no one seems to have tried an all-aluminum or Corian frame. (The great thing about Corian is that you can prepare breakfast while you're listening.)

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