Quote Originally Posted by Tubedude View Post
...I want NOS phrams in these babies...
...In which case you'd be looking for some 20275s*... good luck with that...

*Altec's '75 driver reference lists 3 Magnificent iterations with the 802D, all of which reference the 20275 (next-to-last 6 entries below);

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I agree with bowtie's suggestion of new GPA diaphragms. Equal or superior to any NOS 20275s you'll find (probably less expensive too), and you won't have to hold your breath near as long...