I'd like to pass from a mic/filter/amp circuit with the LM386 and powered by a 9v battery in single supply to a 3.7v equivalent using the PAM8403. In hi-fi audio the phantom DC is 48v. Is there any downside in using a voltage as low as 3.7?
What's the difference in sound quality between using 3.7v and 9v as phantom for electret mic?
Loo
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