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if the company is crazy good at CNC then I'll ask them to taper the rear so that the cross section is actually a triangle
I don't think it will have any effect on the sound, but if you rout from the back face with a tapered bit it will give the visual impression of a zero-thickness surface when viewed from the front at angles of less than half the tip angle of the bit
gbj_tester
Whilst I still await the samples to be delivered... I came up with a different idea.
The idea is a wooden speaker grille... all of it a single piece of wood.
The attachment shows a mashrabiya panel that would allow 50% openness. I don't need this level of complexity to be an effective cat guard. The centre can be opened a lot more and on the Tannoy that's where the tweeter is. Making the middle hole larger is the goal and pushes the openness to 65% which beats most perforated metal speaker grilles.
So I've sent out a request for a quote for a single piece of walnut CNC'd panel where the speaker grille is actually a mashrabiya design. As it's all a single piece of hardwood I believe that the strength of it would be quite high, and that it won't be possible to be a source of vibrations either.
And if the company is crazy good at CNC then I'll ask them to taper the rear so that the cross section is actually a triangle and it should sound even more transparent. I mean... obviously I'd do something stupid like that if it's possible.