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  • Gregg E. commented on Mattosx's instructable An (almost) Entirely 3D Printed Speaker4 months ago
    An (almost) Entirely 3D Printed Speaker

    This is a good proof of concept.For more volume and better sound, make the front much thinner so it's more flexible. Mount it to the case with rubber O rings between it and the case and between the bolt heads and the face. Make the coil form a lot thinner so the coil is much closer to the magnet. The coil should also be wound smoother.Could print a round recess and a thick cover plate made to sandwich a round sound plate between two large O rings.To keep with the mostly 3D printed things, print any O rings used in flexible filament.To make it more like a regular speaker, use ring magnets that are radially magnetized with one pole inward and the other pole outward. Finding two sizes of ring magnets with opposite polarization could be difficult.Assuming such can be found, the center stack...

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    This is a good proof of concept.For more volume and better sound, make the front much thinner so it's more flexible. Mount it to the case with rubber O rings between it and the case and between the bolt heads and the face. Make the coil form a lot thinner so the coil is much closer to the magnet. The coil should also be wound smoother.Could print a round recess and a thick cover plate made to sandwich a round sound plate between two large O rings.To keep with the mostly 3D printed things, print any O rings used in flexible filament.To make it more like a regular speaker, use ring magnets that are radially magnetized with one pole inward and the other pole outward. Finding two sizes of ring magnets with opposite polarization could be difficult.Assuming such can be found, the center stack could be held together with a bolt through their centers while the outer stack could be pressed or glued into the 3D printed case. Might not even need stacks of magnets if opposite polarized ring magnets of nesting sizes are available.Factory made speakers use an axially magnetized ring magnet with a washer on the front and a plate with a center post on the back. That makes a radial flux field across the gap between the front washer and center post.Some cheap speakers use an axially magnetized cylindrical magnet in a steel cup to create a gap with a radial field across it.

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