Shure SM93
Omnidirectional Lavalier Microphone with Preamplifier & XLR-out


The Shure 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.

It 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. The SM93 is also supplied with a dual mounting block with attached tie bar.

The SM93 is powered by phantom power supplied by broadcast, sound reinforcement or recording equipment, or an external phantom supply.  It 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.

Shure SM93 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 is especially tailored for chest-worn microphone operation
  • Controlled low-frequency roll-off reduces low-frequency clothing and room noise
  • Low distortion, wide dynamic range
  • Uniform omnidirectional polar pattern
  • Preamplifier assembly can be pocketed, strapped to the body, or clipped to belt or waist band
  • Wide-range phantom powering accepts all commonly used voltages

Shure SM93 Specifications:

  • Type: Condenser (electret bias)
  • Frequency Response:  80 Hz - 20 kHz, 12dB/octave roll-off 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 ohms with reduced clipping level)
  • Output Level, Open Circuit Voltage: -43 dBV/Pa(7.0 mV)
  • Output Clipping Level (at 1,000 Hz): -18 dBV(0.13 V) minimum
  • Total Harmonic Distortion: Less than 1% at 120dB
  • 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 (IEC651)
  • 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 VdcPhantom. Protected against reverse voltage application
  • Current Drain:  0.33 mA
  • Environmental Conditions
    • Operating Temperatures:  –18° to 57° C (0° to 135° F)
    • Storage Temperatures: –29° to 74° C (–20° to 165° F)
  • Cable:  Black 1.27m (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)
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