EmRR

Interesting!

Those are the values listed under "input impedance" in factory documentation. I suppose this is a classic case of "knowing just enough to be dangerous," because I'm clearly missing something.

At any rate, it sounds good now!

Cheers

Read a whole lot more here.   That is 'intended source impedance' in most cases.   Read the BA-31 manual....actually you should wire it for 150 instead of 600.....it's still bridging.  The API is 1500....still bridgingish enough.   REDD47 document floating around says 2K loading, 200 source Z.

Thing about it another way again....the  BA-31 would  be close enough to tame a resonance if those were true impedances, and it doesn't right? 

Don't take 250 literally.  The 330 you picked is a good choice, but maybe it could also be higher.  470 might do it, far closer to 250 than 1500 is.  You always want same or higher, never lower. 
Best,

Doug Williams
Electromagnetic Radiation Recorders

"I think this can be better. Some kind of control that's intuitive, not complicated like a single knob" - Crusty

"Back when everything sounde


Thanks!

The short-term important thing is that the microphone sounds excellent with all of our preamps now.


 

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