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Model: 377B02

$630.00 USD
(Pricing valid in US only)


1/2" free-field, prepolarized condenser microphone, typical sensitivity= 50 mV/Pa (+/-1.5 dB), 3.15 Hz to 20 kHz (+/-2 dB).

  • Nominal Microphone Diameter: 1/2"
  • Frequency Response Characteristic: Free-Field
  • Frequency Range: (±1dB) 5 to 10000 Hz
  • Dynamic Range: 147 dB re 20 µPa

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Nominal Microphone Diameter1/2"1/2" 
Frequency Response Characteristic (at 0° incidence)Free-FieldFree-Field 
Open Circuit Sensitivity50 mV/Pa50 mV/Pa[2] 
Open Circuit Sensitivity (±1.5 dB)-26 dB re 1 V/Pa-26 dB re 1 V/Pa[2] 
Frequency Range (±1 dB)5 to 10000 Hz5 to 10000 Hz 
Frequency Range (±2 dB)3.15 to 20000 Hz3.15 to 20000 Hz 
Lower Limiting Frequency (-3 dB)1.0 to 2.4 Hz1.0 to 2.4 Hz 
Resonant Frequency (90° Phase Shift)10400 Hz10400 Hz[1] 
Inherent Noise15 dB(A) re 20 µPa15 dB(A) re 20 µPa[1] 
Dynamic Range (3% Distortion Limit)147 dB re 20 µPa147 dB re 20 µPa[1] 
Standards Designation (IEC 61094-4)WS2FWS2F 
Temperature Range (Operating)-40 to +302 °F-40 to +150 °C 
Temperature Coefficient of Sensitivity (+14 to +122°F (-10 to +50°C))0.005 dB/°F0.009 dB/°C[2][1] 
Static Pressure Coefficient-0.013 dB/kPa-0.013 dB/kPa[2][1] 
Humidity Coefficient of Sensitivity (0 to 100%, non-condensing)±0.001 dB/%RH±0.001 dB/%RH[2] 
Influence of Axial Vibration (0.1g (1 m/s²))63 dB re 20 µPa63 dB re 20 µPa[1] 
Capacitance (Polarized)12 pF12 pF[1] 
Polarization Voltage0 V0 V[3] 
Housing MaterialStainless AlloyStainless Alloy 
Mounting Thread (Preamplifier)0.4606 - 60 UNS11.7 mm - 60 UNS 
Mounting Thread (Grid)0.5 - 60 UNS12.7 mm - 60 UNS 
Size - Diameter (with grid)0.52 in13.2 mm 
Size - Diameter (without grid)0.5 in12.7 mm 
Size - Height (with grid)0.64 in16.2 mm 
Size - Height (without grid)0.6 in15.3 mm 
Weight0.28 oz7.8 gm[1] 

All specifications are at room temperature unless otherwise specified.

Product Notes
[1] Typical.
[2] re 250 Hz
[3] Prepolarized
ACS-20Calibration of Precision Condensor Microphones(1)
Optional Versions:
No optional versions
Product Documents
Additional Downloads
Microphone - Safe Handling and Maintenance

Prepolarized vs. externally polarized microphones

Sound power measurements Part 1

Sound power measurements Part 2

Comparison of 1/2" vs 1/4" condenser microphones