Mic PreAmplifier

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As I'm sure you know, you don't mix at microphone levels, you use microphone preamps to bring it up to line levels, and mix it then. Presumably the intention is to use the microphone preamps earlier in this thread to feed the mixer.
 
I am not connecting MICs directly to Summer.
I am doing some thing like this:
Mics-->Mic Preamplifier-->Summer.
I have already posted Mic preamplifier in this thread.

Thanks.
 
Just compare.

Which circuit will be the best for MIC PreAmp.

Circuit A
**broken link removed**

OR

Circuit B
**broken link removed**

Thanks.
 
The TL072 is too noisy to be a low level mic preamp. The BC559 transistor circuit has much less noise.
 
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