Shure Incorporated SM Series Lavalier Microphone SM93

The SM93 is an economical omnidirectional miniature lavalier condenser microphone designed for use in speech applications. Despite its small size, the microphone element provides full, clear sound comparable to that of much larger microphones. Its frequency response is tailored to body-worn applications, with low-end rolloff and presence rise.
The SM93 is powered by phantom power supplied by broadcast, sound reinforcement or recording equipment, or an external phantom supply. The SM93 operates over an extremely wide voltage range of 11 to 52 Vdc, covering both DIN and IEC phantom power standards.
Type
80 to 20,000 Hz, 12 dB/octave rolloff below 100 Hz
Response Curve Image Small SM93 WL93 View Larger
Polar Pattern
Omnidirectional, uniform with frequency
Output Impedance
Rated at 150 ohms (90 ohms actual)
Recommended minimum load impedance: 800 ohms
(May be used with loads as low as 150 with reduced clipping level)
Output Level
Open Circuit Voltage: -43 dBV/Pa (7.0 mV)
(1 Pascal = 94 dB SPL)
Output Clipping Level (at 1,000 Hz)
-18 dBV (0.13 V) minimum
Total Harmonic Distortion
Less than 1% at 120 dB
Maximum SPL
120 dB
Dynamic Range (maximum SPL to A-weighted noise level)
98 dB
Output Noise (equivalent SPL)
22 dB typical, A-weighted 26 dB, weighted per DIN 45 405
Hum Pickup (electromagnetic)
-4 dB equivalent SPL in a 1 mOe field (60 Hz)
Signal-to-Noise Ratio
72 dB at 94 dB SPL (IEC 651)
Polarity
Positive pressure on microphone diaphragm produces positive voltage on pin 2 relative to pin 3 of preamplifier output cable connector
Recommended Operating Voltage
11 to 52 Vdc phantom. Protected against reverse voltage application
Current Drain
0.33 mA
Environmental Conditions
Operating Temperatures: -18 to 57 degrees C (0 to 135 degrees F)
Storage Temperatures: -29 to 74 degrees C (-20 to 165 degrees F)
Cable
Black 1.27 m (4.17 ft), attached, two-conductor, shielded, terminated by miniature connector type (TA4F)
Case
Microphone: Black ABS thermoplastic case with stainless-steel-mesh grille
Preamplifier: Steel case with non-reflective black finish, black-chrome belt clip
Net Weight
Microphone: 16 g (0.57 oz)
Preamplifier: 118 g (4.17 oz)