Lavalier Microphone

The Shure SM Microphones Series SM-93 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 SM 93 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.

The SM93 is supplied with a sew-on mounting bracket, a mounting block with attached tie bar, and an acoustic windscreen to minimize wind noise in outdoor applications. It is also supplied with a dual mounting block with attached tie bar.

→ Subminiature lavalier design; ideal size for theater, television broadcasting, video, film, and sound reinforcement
→ Small, inconspicuous mounting hardware
→ Full, clear sound comparable to larger microphones
→ Smooth extended frequency response with presence rise specially tailored for chest-worn microphone operation
→ Controlled low-frequency rolloff reduces low-frequency clothing and room noise
→ Low distortion, wide dynamic range
→ Versatile mounting accessories allow a variety of low-visibility applications
→ Preamplifier assembly can be pocketed, strapped to the body, or clipped to belt or waistband
→ Omnidirectional condenser

Type	80 to 20,000 Hz, 12 dB/octave rolloff below 100 Hz
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
Frequency response	80 to 20,000 Hz