Excellent way to maximize your microphone"s signal quality, with problem-solving features and impeccable sonic quality * Get the best sound possible out of any mic with the variable input impedance * Low-cut filter is variable from 20Hz-250Hz to cut out unwanted low end, optimizing your signal before it ever hits your preamp * Great way to transparently increase the output of ribbon and dynamic mics * Requires +48V phantom power from your preamp