Found a microphone at the venue I work at, some kind of reference microphone? Help identifying? No distinguishing marks on box or microphone. : r/livesound
Audio Analysis Tools, Part 1 – FOH | Front of House Magazine
Rational Acoustics RTA-420 Measurement Microphone with Calibration Files | Reverb
Thouhts on Rational Acoustics' RTA-420 Measurement Mic?