[SOLVED] Simple Understanding Problem with Electret Microphone..

sky_123 said:

Can I ask, what on earth is the purpose of this mic amp that you're making?
If it is for speech, and for connecting to an LM386 as mentioned, then I think it will "work".
I think you're really over-worrying that it may not function adequately enough with any
generic electret capsule.
That circuit has very high gain, so you may want to decrease it, on the other hand if you need the
gain, then the circuit is ok. Freq response of the amp very acceptable for an electret capsule.
I've been running it for a year now, and it works well with a generic electret element that was
then housed to be water resistant, so I needed high gain and relatively low noise, and other factors
were not a concern, so this circuit was very ideal for my needs.

If you want a hi-fi circuit, I suggest you ditch the single transistor idea and look for a
hi-fi circuit with far less distortion+noise than this circuit, pick a ready-constructed
electret (or other) mic with balanced output (it will be powered by 48v if it's electret - but it will
run on less, I use a few PP3 batteries) and pick a way better amplifier than the LM386, I think maybe
that i.c. is 20 years old or more..

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