Mic Preamp circuit using C945 Transistor | Mic to Speaker | Clear sound - YouTube
GitHub - naufalboys/Mic-Preamp: A simple mic preamp for interfacing a balanced microphone (3-Pin using XLR Connector) with PC Sound Card or other gear. This PCB Design is double sided. If you have
Balanced Microphone Preamplifier - EEWeb
microphone - How can I remove noise in my preamplifier circuit? - Electrical Engineering Stack Exchange