General Rules for Lavalier Microphone
Use
• Attach the microphone approximately 76 mm to
152 mm (3 to 6 in.) below the neckline for the
best sound.
• Do not cover the microphone with your hand or
clothing.
• Use one of the supplied windscreens to
minimize wind and breath noise.
• If four or more microphones will be active at
any given time, use of an automatic mixer,
such as the Shure SCM810 or SCM410, is
recommended.
Tie Clip
Insert the top of the
microphone through
tie clip loop from below
until tie clip loop snaps
into place over the
lower groove on the
microphone.
Specifications
Cartridge Type
Electret Condenser
Frequency Response
50–17000 Hz
Polar Pattern
MX183:
Omnidirectional
MX185:
Cardioid
MX184:
Supercardioid
Output Impedance
EIA rated at150 Ω (180 Ωactual
Output Configuration
Active Balanced
Sensitivity
@ 1 kHz, open circuit voltage
Cardioid
–35 dBV/Pa(18 mV)
Omnidirectional
–28 dBV/Pa(42 mV)
Supercardioid
–34 dBV/Pa(21 mV)
1 Pa=94 dB SPL
Maximum SPL
1 kHz at 1% THD, 1 kΩ load
Cardioid
124 dB
Omnidirectional
117 dB
Supercardioid
123 dB
Equivalent Output Noise
A-weighted
Cardioid
28 dB SPL
Omnidirectional
21 dB SPL
Supercardioid
27 dB
Signal-to-Noise Ratio
Ref. 94 dB SPL at 1 kHz
Cardioid
66 dB
Omnidirectional
74 dB
Supercardioid
68 dB
Dynamic Range
1 kΩ load@ 1 kHz
96 dB
Common Mode Rejection
10 Hz to 100 kHz
45 dBminimum
Preamplifier Output Clipping Level
at 1% THD
–6 dBV (0.5 V)
Polarity
Positive sound pressure on diaphragm produces
positive voltage on pin 2 relative to pin 3 of out-
put XLR connector
Environmental Conditions
Operating Temperature –18–57°C (0–135°F)
Storage Temperature
–29–74°C
(–20–165°F)
Relative Humidity
0–95%
Power Requirements
11–52 V DC, 2.0 mA
Cable
1.2 m (4 ft)
3