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SPECIFICATIONS | WB98H/C Microphone (with standard test cir-  | 
  | BETA 98H/C Microphone (with preamplifier) | 
  | cuit shown in Figure 1)  | 
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Dynamic Range (maximum SPL to  | 112.5 dB  | 
  | 132 dB (2.5 kW load)  | 
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Output Noise (equivalent SPL)  | 31 dB typical,   | ||
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63 dB at 94 dB SPL (IEC 651)  | |||
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Polarity  | Positive pressure on microphone diaphragm  | 
  | Positive pressure on microphone diaphragm  | 
  | produces positive voltage on pins 3 and 4 with  | 
  | produces positive voltage on pin 2 relative to  | 
  | respect to pin 1 (ground).  | 
  | pin 3 of preamplifier output connector.  | 
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Recommended Operating Voltage  | 5 V (pin 2 to pins 3 and 4)  | 
  | 11 to 52 Vdc Phantom  | 
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Environmental Conditions  | Operating temperatures:  | .  | . . . . . . . . . . . .   | 
  | Storage temperatures:  | .  | . . . . . . . .   | 
  | Relative Humidity:  | .  | . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 95%  | 
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Net Weight  | Microphone w/cable and   | 
  | Microphone w/cable and preamplifier:  | 
  | (TA4F): 65 g (2.3 oz.)  | 
  | 156 g (5.5 oz.)  | 
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