Sound Professionals SP-PREAMP-20 - Mini stereo microphone preamplifier SP- PREAMP-20
Microphone Preamp Buying Guide
RME QuadMic II 4-Channel Microphone Preamp QUADII B&H Photo Video
Electret Microphone Pre Amp
Amazon.com: Tinsea MINI II 70dB Gain Adjustable Microphone Preamp Dynamic Microphone Instrument Effect Amplifier Audio Interface Microphone Karaoke Audio Studio Sing Music Recording : Musical Instruments
amplifier - How to build a low noise MIC preamp - Electrical Engineering Stack Exchange
QA470 Low Noise Mic Pre-amp [Retired] – QuantAsylum
Microphone Preamplifier Circuit Using TL071 Op-Amp
Amazon.com: Rodyweil Microphone Preamp Mic Gain Booster with 2 Input Max 75db Gain 48V Phantom Power XLR Output for Dynamic and Condenser Mic : Musical Instruments