The Shure FP410 is a professional 4-channel automatic microphone mixer designed to intelligently manage multiple open microphones in meeting rooms, courtrooms, classrooms, and houses of worship. Its primary function is to control which microphones are active at any given time, using advanced gain-sharing and priority algorithms to automatically open channels with a speaking participant and close channels that are idle. This automatic gating significantly reduces background noise, room reverberation, and the potential for feedback that occurs when multiple microphones are left open simultaneously, resulting in clearer, more intelligible audio for both live reinforcement and recording.

Operation is centered on achieving a natural, conversational flow without requiring a dedicated audio operator. The mixer employs a sophisticated threshold detection system that responds to the level and dynamics of speech, ensuring fast, transparent activation and release of channels. It features manual override controls, allowing a technician to lock specific channels open for a continuous presenter or to mute them entirely. The unit provides balanced line-level outputs and includes essential processing tools such as adjustable input gain, a low-cut filter on each channel to reduce rumble, and a Last Mic Lock-On function that keeps the most recently active channel open for a brief, adjustable period to accommodate pauses in speech.

Housed in a compact, half-rack metal chassis, the FP410 is designed for easy integration into fixed installation equipment racks. It is a reliable, set-and-forget solution that improves the audio experience in multi-participant environments by minimizing common problems like hollow room sound, excessive noise, and acoustic feedback. By automating the critical task of microphone management, it allows presenters and participants to focus on their discussion while ensuring their voices are picked up clearly and consistently, making it an invaluable tool for professional conferencing and presentation systems.