Amazon.com: Rodyweil Microphone Preamp Mic Gain Booster with 2 Input Max 75db Gain 48V Phantom Power for Dynamic and Condenser Mic : Musical Instruments
Sound Professionals SP-PREAMP-20 - Mini stereo microphone preamplifier SP- PREAMP-20
Low Noise Microphone Preamp
Dynamic Microphone Preamplifier – Rugged Radios
What Is a Mic Preamp, and Why Do I Need One? – Flypaper