The M3 is an innovative, tri-element hanging ceiling microphone designed for applications where aesthetics, sound quality, and ease of installation are critical. The M3 is an ideal audio capture solution for video conferencing, distance learning, courtroom activities, and surgical procedures. It can also be used for ambient room miking and surveillance.
The M3 ceiling microphone incorporates three phase coherent hypercardioid capsules with tailored frequency response optimized for speech intelligibility. This is accomplished by minimizing frequencies caused by noise, vibration, paper shuffling, keyboard strokes, fans, and heating /air conditioning. Low noise preamp circuitry is employed for highest possible signal to noise and studio quality sound. A high-quality silicone jacketed microphone cable ensures a balanced, shielded signal and a very clean look. Electronics above the ceiling are housed within a plenum rated junction box and cable connections are made via an RJ45 connector embedded within a proprietary brass housing for an airtight seal.
The M3 installed ceiling microphone connects to the input of a mixer or dsp console via a breakout cable (provided). The breakout cable consists of a female RJ45 connector that terminates in either three terminal block or XLR connectors. A variety of optional shielded CAT7 cable lengths (from plenum rated junction box to break out cable) are available.
Installing the M3 requires drilling just one 5/8-inch hole in the ceiling, with no additional tools needed. The M3 mounting hardware easily adjusts the cable hanging height up to four feet from the ceiling surface without removing ceiling tiles. A wire safety cable provides additional seismic restraint.
Transducer Type Pre-Polarized Condenser
Frequency Response 30 Hz – 19 kHz
Optimized Response 70 Hz – 9 kHz (see chart)
Polar Pattern Hypercardioid
Output Impedance 150 Ohms balanced
Sensitivity 34 mV / Pa @ 1k
Off Axis Rejection 1 capsule >23 dB at 180º relative to 0º
2 capsules >18 dB at 120º
3 capsules >9 dB at 60º
Signal/Noise Ratio (A-weighted) 72 dB
Equivalent Noise Level (A weighted) 22 dB (A weighted)
Maximum SPL @ .5% THD ≥128 dB
Dynamic Range 106 dB
Power Requirements 18 – 52 Volts phantom
Cable/Connector Terminal block or XLR
Polarity Positive pressure on diaphragm produces positive
voltage on pin 2 relative to pin 3
Weight 95 grams (mic only) / 3.32 ounces
Diameter 50mm (2 inches)
Length 30mm (1.2 inches)