Tri-element Hanging
M3
OVERVIEW
The M3 is an innovative, tri-element hanging microphone system 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 incorporates three phase coherent hypercardioid capsules with tailored frequency responses
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.
Ceiling Microphone
FEATURES
The M3 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 blocks
or XLR connectors (optional). 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.
SUPPLIED ACCESSORIES
JBM3 - Plenum rated junction box
ANCHRJB60V2 - Seismic/fire strain relief
CBLM3TERM - Breakout cable consisting of RJ45 female to 3 terminal
block connectors
OPTIONAL ACCESSORIES
CBLM3BXLR - Breakout cable consisting of RJ45 female to 3 XLR male
connectors
CBLM307 - CAT 7 Interface cable , 7 meters (23’) RJ45 with Plenum
cover , twisted shielded pairs
CBLM310 - as above , 10 meters (33’)
CMBM315 - as above, 15 meters (49’)
CBLM320 - as above , 20 meters (66’)
CBLM325 - as above, 25 meters (82’)
CLBM30 - as above, 30 meters (98’)
PLENHSM3S - Brass Plenum bell housing
• 100% RF shielding and immunity
• Gold diaphragm condenser capsules with studio
quality sound
• Low impedance design allows for extremely
long cable runs (if required) without cross talk or
interference
• Frequency and pattern tailored for voice clarity and
rejection of extraneous noise
• Evenly dispersed sound with undetectable phase
• High-quality silicone jacketed microphone cable with
adjustable length and position
• Plenum rated junction box with RJ45 connector
• All visible components of the microphone and cable
are same color: charcoal or white
• TAA compliant
• Very high output, low self-noise
• Easy to install
APPLICATIONS
• Zone Capture
• Video Conferencing
• Distance Learning
MODELS
M3 - Microphone and cable in charcoal grey color
M3W - Microphone and cable in white
• Hospital and medical procedure
• Courtroom
• Ambient room miking
M3
SPECIFICATIONS
Tailored Frequency Response
BW QDI
76 4.7 6.7
76 4.7 6.7
76 4.7 6.7
M3 Polar x 3
-90
Ratio vs Angle
BW QDI
62 5.8 7.7
76 4.7 6.7
76 4.7 6.7
76 4.7 6.7
73 5.0 6.9
80 4.5 6.5
Transducer Type
Frequency Response
Optimized Response
Polar Pattern
Output Impedance
Sensitivity
Off Axis Rejection
Signal/Noise Ratio (A-weighted)
Equivalent Noise Level (A-weighted)
Maximum SPL @ .5% THD
Dynamic Range
Power Requirements
Cable/Connector
Polarity
Weight
Diameter
Length
Pre-Polarized Condenser
30 Hz – 19 kHz
70 Hz – 9 kHz (see chart)
Hypercardioid
150 Ohms balanced
34 mV / Pa @ 1k
1 capsule >23 dB at 180º relative to 0º
2 capsules >18 dB at 120º
3 capsules >9 dB at 60º
72 dB
22 dB (A weighted)
≥128 dB
106 dB
18 – 52 Volts phantom
Terminal block or XLR
Positive pressure on diaphragm produces
positive voltage on pin 2 relative to pin 3
95 grams (mic only) / 3.32 ounces
50mm (2 inches)
30mm (1.2 inches)
ARCHITECTS AND ENGINEERS
SPECIFICATION
The microphone shall be of the condenser type with
three elements having a hypercardioid polar pattern. The
microphone shall be protected from RF interference. The
microphone shall have a fully integrated preamp circuitry
housed within a plenum rated junction box. The microphone
shall consist of three individual circuits each operating on 1852 Volts DC and the nominal output impedance shall be equal
to 150 Ohms at 1 kHz. The microphone shall have a sensitivity
of 34 mV / Pa at 1 kHz and a maximum SPL level of ≥ 128 dB
with THD of 0.5%. The microphone housing shall be machined
out of brass with a steel mesh protective grill. The outer
dimensions shall be 50mm in diameter by 30 mm in length.
The microphone shall be the Audix M3.
102.0
50.10
49.77
30.24
Plenum Box - bottom view Plenum Box - side view
102.0
M3
40.0
5
dBm
0
-5
-10
20 Hz 50 100 200 500 1K 2K 5K 10K 20K
Low Frequency Noise
Frequencies below 70Hz minimized in order to
reduce boominess, hum, rumble, table noises,
HVAC, ambient interference.
High Frequency Noise
Frequencies above 9 KHz minimized in order to
reduce unwanted noise from paper shuing,
keyboards, HVAC, fan noise, ambient interference.
Ideal for Vocal Clarity and
Voice Recognition
Frequencies between 200 Hz – 1kHz are
optimized for speech.
M3 Polar x 1 M3 Polar x 3
Capsule 1
dBR
0
-3
-6
-9
-12
-15
-18
-21
-24
-27
-30
-180
-27
-24
-21
-18
-15
-12
-9
-6
-3
0
120
150
-150
-120
90
60
-60
Curve Freq
30
0 Deg
-30
250.00
500.00
1.00K
2.00K
4.00K
8.00K
dBR
0
-3
-6
-9
-12
-15
-18
-21
-24
-27
-30
-27
-24
-21
-18
-15
0 Deg
-12
-9
-6
-3
0
0 Deg
Curve Freq
0 Deg
Capsule 2Capsule 3
500.00
1.00K
2.00K
***All specications subject to change without notice.
www.audixusa.com
Audix Corporation 9400 SW Barber St. Wilsonville, OR 97070
503-682-6933 Fax: 503-682-7114
ver. 1.1 12-14
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