Model: 377A12

$850.00 USD
(Pricing valid in US only)


1/4" pressure, prepolarized condenser microphone typical sensitivity= 0.25 mV/Pa (+/-3 dB), 4 Hz to 20 kHz (+/-2 dB).

High amplitude prepolarized microphone

  • Nominal Microphone Diameter: 1/4"
  • Frequency Response Characteristic: Pressure
  • Frequency Range: (±2dB) 4 to 20000 Hz
  • Inherent Noise: <60 dB(A) re 20 µPa
  • Dynamic Range: (3% Distortion Limit) 182 dB re 20 µPa

Add this product to my product comparison
Compare selected models ()

Nominal Microphone Diameter1/4"1/4" 
Frequency Response CharacteristicPressurePressure 
Open Circuit Sensitivity (±3 dB)-72 dB re 1 V/Pa-72 dB re 1 V/Pa[2] 
Open Circuit Sensitivity0.25 mV/Pa0.25 mV/Pa[2] 
Frequency Range (±2 dB)4 to 20000 Hz4 to 20000 Hz 
Lower Limiting Frequency (-3 dB)0.5 to 3.0 Hz0.5 to 3.0 Hz 
Resonant Frequency (90° Phase Shift)48900 Hz48900 Hz[1] 
Inherent Noise<60 dB(A) re 20 µPa<60 dB(A) re 20 µPa 
Dynamic Range(3% Distortion Limit)182 dB re 20 µPa182 dB re 20 µPa[1] 
Maximum Sound Pressure Level(Peak)>194 dB re 20 µPa>194 dB re 20 µPa 
Temperature Range (Operating)-40 to +248 °F-40 to +120 °C 
Temperature Coefficient of Sensitivity (+14 to +158°F (-10 to +70°C))0.004 dB/°F0.007 dB/°C[1][2] 
Static Pressure Coefficient-0.001 dB/kPa-0.001 dB/kPa[1][2] 
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))72 dB re 20 µPa72 dB re 20 µPa[1] 
Capacitance (Polarized)4.6 pF4.6 pF[1] 
Polarization Voltage0 V0 V[3] 
Housing MaterialStainless AlloyStainless Alloy 
Mounting Thread0.2244 - 60 UNS5.7 mm - 60 UNS 
Mounting Thread0.25 - 60 UNS6.35 mm - 60 UNS 
Size - Diameter (with grid)0.28 in7.0 mm 
Size - Diameter (without grid)0.25 in6.4 mm 
Size - Height (with grid)0.41 in10.4 mm 
Size - Height (without grid)0.36 in9.1 mm 
Weight0.06 oz1.7 gm[1] 

All specifications are at room temperature unless otherwise specified.


Product Notes
[1] Typical.
[2] re 250 Hz
[3] Prepolarized
[4] See PCB Declaration of Conformance PS167 for details.
ACS-20Calibration of Precision Condensor Microphones(1)
Optional Versions:
No optional versions
Product Documents
Additional Downloads None Listed
Microphone - Safe Handling and Maintenance

Prepolarized vs. externally polarized microphones

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