I have written a lot of on electret microphone connections on my Powering microphones document. Here are some additions to my documents on electret microphones I found at SANKEN Basis of Wiring Method web page.
The first circuit diagram shows the traditional “2 wire” method of wiring an electret capsule. Practically all electrets I have worked with have been wired using this same idea (2 wire capsules have the FET is included in the microphone head wired in this way).
Image source: http://www.sanken-mic.com/en/qanda/index.cfm
This method can have approx.10dB gain because of FET DRAIN output which is usually good thing. The downside is that this kind of microphones can have have some unevenness in output level because of FET gm difference. Also the mic may have a negative phase output signal when it has a positive sound wave. Usually those are not a bog deal.
Here is another way to wire a 3-wire electret capsule with somewhat different properties:
Image source: http://www.sanken-mic.com/en/qanda/index.cfm
In this circuit there is no gain because a signal is FET SOURCE output (so the output signal level is around 10 dB lower). And I expect to get a positive phase output signal from positive sound wave.
Third thing I have sometimes wondered is the wiring of the mini XLR connectors used on some wireless microphone transmitters. The hCOS-11D PT Wiring Method for AKG Transmitter page gives one idea of such wiring. The page has also links to wiring instructions for many other transmitters.
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How did you wire up that beast? Looks like a lot of work on that single phase motor.
Im grateful for the article.Thanks Again. Really Great.
Enjoyed every bit of your blog.Much thanks again. Awesome.
i bought a Soundboard and a Mic. Another 1 in the operates– have been truly hectic. Really Occupied. As in: no time to fuck away
If you keep the info pouring in you will have tons more viewers coming to see what you have to write, thanks.
Tanks for all mic infos. (preamp vs)
Nice and usefull blog.
Thank you for your feedback.
Hi all,
I have a strange problem with my radio audio device.
If I connect to mic in a cd player in the headset in the other room I have a good quality for audio stream but if i connect a microphone (pc microphone) the audio stream is very low quality.
Can help me?
I tried your scheme but the result is the same.
Bye
I need more details to be able to give good advice.
Can you give more details on the exact devices used on your setup?
And also what kind of quality problems do you have in your audio stream?
great blog!