Grado SR-80 adapter for Porta Pro drivers
thingiverse
I managed to pick up a couple of Grado cups and headbands from a rebuild project and thought it would be a blast to create some Porta Pro driver adapters for kicks. It's working out great as a press-fit, both for the adapter and drivers. The sound quality is pretty decent, with a slightly bassier tone than the original Porta Pros. I haven't spent too much time listening to them yet.
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