Quote Originally Posted by RonSSS View Post
You will have to cut down the screw length. Or just get shorter SS screws at the HW store.
Typically 1/4” felt.

It would be interesting to do a DATS freq sweep of impedance with and without the loading cap. With and without the felt etc.
I did some of that but didn’t save the data. And I don’t have any loading caps.
Once I get setup again, I now have a "reference" condesor mic and can make the sweeps with REW. My previous mic was an AKG C414EB.

I am also going to pop off the loading caps on the 604 Big Reds. And to answer the question about pressure on the diaphragm without the cap, the back cover should preclude that occurance.

Cheers and thanks for all the input.

PS I'm still not getting email notifications of replies, not sure why. Todd?