A mic preamp's job is simple to state and easy to get wrong in practice: take a low-level signal from a microphone and bring it up to line level cleanly enough that everything downstream (your interface, your converters, your mix) has something good to work with. For a home setup, the right choice depends less on brand and more on a short list of concrete specs and practical trade-offs. Gain Range and Headroom Check the minimum and maximum gain a preamp offers, not just the m