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  • Type: Cardioid condenser (electret bias)
  • Frequency Response: 20 to 20,000 Hz
  • Polar Pattern: Half-cardioid (cardioid in hemisphere above mounting surface), uniform with frequency, symmetrical around axis.
  • Output Level (at 1,000 Hz): Open Circuit Voltage: -59 dBV/Pa* (1.1 mV) typical; *1 Pa = 94 dB SPL
  • Maximum SPL: (20 Hz to 20 kHz, less than 1% THD)
    • 2.5 kilohm load: 160 dB
    • 1 kilohm load: 156 dB
    • Preamplifier Output Clipping Level: (20 Hz to 20 kHz, less than 1% THD*)
      • 2.5 kilohm load: 6 dBV (2.0 V)
      • 1 kilohm load: 2 dBV (1.26 V)
      • *THD of the microphone preamplifier when applied input signal is equivalent to the cartridge output at specified SPL.
      • Dynamic Range: (20 Hz to 20 kHz, less than 1% THD, 2.5 kilohm load); 25 dB (max SPL minus A-weighted noise)
      • Output Noise: 35 dB SPL (typical), A-weighted
      • Signal-to-Noise Ratio: 59 dB re 94 dB SPL
      • Output Impedance: 150 ohms (actual)
      • Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
      • Power: Phantom Power: 48 Vdc +/- 4 Vdc (IEC-268-15/DIN 45 596), positive pins 2 and 3
      • Electromagnetic Hum Pickup: -7.5 dB equivalent SPL in 1 mOe field (60 Hz)
      • Cable: 4.6 m (15 ft) heavy-duty, two-conductor shielded, TA4F to TA3F connectors
      • Case: Matte-black , painted, die-cast, zinc-alloy case with matte-black steel grille
      • Dimensions: 95 mm x 129 mm x 19 mm (3.75 in. x 5.08 in. x 0.75 in.)
      • Weight: 13.5 ounces (less cable)

Shure Beta 91 Plate Microphone

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