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The SM93 is an economical omnidirectional subminiature lavalier condenser microphone designed for use in speech applications. Despite its small size, the 93 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. A dual-channel power supply (Shure Model PS1A) is available for providing phantom power to the SM93.

A wireless version is available as the WL93.

SM93 - Includes mounting bracket, single and dual mounting block, acoustic windscreen. Phantom power required.

Features:

• 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
• Frequency response: 80 to 20,000 Hz

Specifications:

• Type: Condenser (electret bias) Condenser (electret bias)
• Frequency Response: 50 to 20,000 Hz 80 to 20,000 Hz, 12 dB/octave rolloff below 100 Hz
• Polar Pattern: Omnidirectional, uniform with frequency Omnidirectional, uniform with frequency
• Output Impedance: 3000 ohms 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: (1 Pascal = 94 dB SPL) Open Circuit Voltage: -38 dBV/Pa (13 mV) Open Circuit Voltage: -43 dBV/Pa (7.0 mV)
• Output Clipping Level (at 1,000 Hz): 0.25 V at 120 dB -18 dBV (0.13 V) minimum
• Total Harmonic Distortion: Less than 1% at 120 dB Less than 1% at 120 dB
• Maximum SPL: 120 dB 120 dB
• Dynamic Range (maximum SPL to A-weighted noise level): 102 dB 98 dB
• Output Noise (equivalent SPL): 18 dB typical, A-weighted 22 dB typical, A-weighted 26 dB, weighted per DIN 45 405
• Hum Pickup (electromagnetic): N/A, -4 dB equivalent SPL in a 1 mOe field (60 Hz)
• Signal-to-Noise Ratio: 76 dB at 94 dB SPL (IEC 651) 72 dB at 94 dB SPL (IEC 651)
• Polarity: Positive pressure on microphone diaphragm produces positive voltage on pins 3 and 4 with respect to pin 1 (ground), Positive pressure on microphone diaphragm produces positive voltage on pin 2 relative to pin 3 of preamplifier output cable connector
• Recommended Operating Voltage: 2 to 10 V; 5 V nominal (pin 2 to pins 3 and 4) 11 to 52 Vdc phantom. Protected against reverse voltage application
• Current Drain 40 microA typical, 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) 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 (WL93T: Tan 1.27 m [4.17 ft]) 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 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)