Highly Accurate Test and Measurement Microphone with Calibration Data and Sensitivity Measurement on CD 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: TM1PLUS - includes calibration data file and sensitivity, threaded acoustic windscreen, and TM1CA4231 machined calibration adapterFeatures: 6mm pre-polarized condenser capsule Hi SPL response Precision machined brass housing Low noise electronics Linear Accurate Response Omnidirectional Polar Pattern Flat Frequency Range Precision Machined 4-Stage Brass Body Specifications: Transducer: Pre-polarized Condenser Polar Pattern: Omnidirectional Frequency Response: 20Hz to 25kHz (+/- 2dB) Dynamic Range (Typical): 112dB Signal-to-Noise Ratio: 66dB EIN: 28dB A-weighted Maximum Input Sound Level: 130dB with distortion < 1% 140dB Max Power Requirements: 18 - 52V Phantom Output Impedance: 200 ohms Output Connectors: 3-pin XLR Sensitivity: 6.5mV / Pa @ 1k Housing: 4 Piece Precision Machined Brass Dimensions: Length 5.9" (150mm)