Electret Condenser Microphone Preamplifier by BC650C or BC549C - EEWeb
Audio-Technica AT4040 Condenser Microphone with Preamp & Cable
GFS EAP-100 Endpin preamp Kit with internal Condenser Microp
MIC Pre-amplifier - Electronics-Lab.com
DIY JFET Mic Pre: DIY JFET Mic Preamp and Beyond! | Tape Op Magazine | Longform candid interviews with music producers and audio engineers covering mixing, mastering, recording and music production.
An INA217 Mic preamp | theslowdiyer
FiveFish Audio - X-12 Mic Preamp Kit
SCA A12B Microphone Preamp Module | Seventh Circle Audio
Phantom Powered Microphone Pre-Amplifier using SSM2019 - Electronics-Lab.com