I just recently bought some Church Audio CA-11 omni caps to use on my STA-11 (old version of CA-11) cardioid microphones but it seems like the new omni caps are singnificantly out of balance.
I went ahead and tested all four combinations of caps and bodies with a 1kHz test tone and the recorded results in Audacity looks like this:
FLAC audio file - ( SPEAKER > CA STC-11 > SONY PCM-M10 using PIP):
STC-11 CARDS STOCK - CARDS LRSWITCH - OMNI CAPS- OMNI CAPS LRSWITCH.flac (916kb)
[dropbox link - click "No thanks, continue to view", then "Direct download" from the upper right Download dropdown arrow]:
http://bit.ly/2aYKbVCOther than the cardioids in original LR configuration, there seems to be only one combination of omni caps (the last one) that is even close to being balanced - but it's still quite off. I just can't figure out why the other two combinations are so incredibly lopsided. I don't think Chris would have sent out omni replacement caps that are this far out of whack.
I'm guessing that it might have something to do with the FETs:
In a previous thread (linked below) Chris mentions that the CA-11 cardioids have a FET (field-effect transistor) inside the Left & Right microphone bodies that is calibrated specifically for each of the corresponding Left & Right capsules. This means that with CA-11 cardioids you must use the Left mic body with the Left cap and the Right body with the Right cap otherwise the microphone levels will be out of balance:
CA-11 Interchangable caps - Can someone explain?
http://taperssection.com/index.php?topic=159663.msg2009489#msg2009489Can the STC-11 cardioid FET(s) also affect the CA-11 omni replacement caps to this degree?
If so, how am I to get balanced levels using replacement omni caps for these older cardioid mics?
Anyone else using replacement omni caps with their CA-11 cardioids?
Thanks to anyone who can help!