An electronic circuit or stand-alone device that boosts microphone input. A mic preamp is used to adjust the volume of the signal sent to powered speakers or an amplifier. Unlike a phono preamp ...

Typically built into an audio or A/V receiver, phono preamps also come as external devices for units without phono inputs as well as for audiophiles who want the highest-quality restoration.

Since it records video that can be directly imported to his editing suite of choice he didn’t want to just buy a different model, so he cracked it open and added an external mic input.