The PreSonus PRM1 delivers excellent quality in an amazingly affordable reference (measurement) mic. It has an omnidirectional polar pattern and exhibits linear frequency response (20 Hz – 20 kHz) and is especially recommended for use with PreSonus StudioLive mixers and VSL with Smaart Measurement Technology. The PRM1 is a special type of condenser microphone that provides an accurate reproduction of a room’s sound characteristics for use with audio-analysis tools such as real-time analyzers (RTAs) and spectrographs. It has an omnidirectional polar pattern and exhibits linear frequency response between 20 Hz and 20 kHz, so it won’t color the sound. With this mic and PreSonus VSL software with Smaart Measurement Technology, PreSonus StudioLive digital mixer owners can have a powerful and affordable audio-analysis and correction system.