For sale is a rare Pair TAD Pioneer DP-4001 4002 Replacement Beryllium Diaphragm. These are both in great condition, and test very close on their meter ohm reading.

Please take a look at the photos for more detailed information, as they’ll do a better job of illustrating its shape than words can. 

Ohm meter tested with readings pictured. 

I have packed many vintage items and know how to treat them with the care. They need to ensure they are properly protected during transit.

Any questions, please email me and I’ll do my best to respond quickly. Thanks for looking.