Omni-directional test and measurement microphone for RTA and software systems. The TM1 is a 6 mm pre-polarized condenser microphone used for test and measurement applications. The TM1 is known for its linearity, accurate response, consistency, ease of use and affordability. Equipped with a uniformly controlled omnidirectional polar pattern, the TM1 is designed to capture acoustic measurements for room analysis software programs, real time analyzers and other sound control devices. With a flat frequency range of 20 Hz - 25 kHz, the TM1 is an excellent tool for sound engineers, sound companies and recording enthusiasts. The TM1 is designed, machined, assembled and tested by Audix in the USA. Model Variation: TM1 PLUS - includes calibration data file and sensitivity, threaded acoustic windscreen, and CA4231 machined calibration adapter Specifications : - Type : Pre-polarized Condenser - Polar Pattern : Omni-directional - Frequency Response : 20Hz - 25kHz /-2 dB - Impedance : 200 Ohms - Sensitivity : 6 mV/Pa @1k