Hi All! I really don't know anything about audio preamplifiers (or audio for that matter) but I am helping the church I go to. They want to improve the sound of the total audio there (music from the band, microphone audio for the priest/speakers). We're told amps are not allowed because they distort all the mics and the sound guy wants to have full control of the sounds. Been searching online and read a bit about how audio preamplifiers could help in this department https://bzbexpress.com/Preamplifiers/ . I've also found a bunch on Amazon as well. Don't even know if these are the correct items needed. I'm sorry if my terminology is off or am unclear, but just trying to help them out best I can. Haha. Honestly, their audio all sounds fine to me. Thanks for any input.