Model: 378C01

$1,350.00 USD
(Pricing valid in US only)


1/4" free-field, prepolarized 377C01 microphone and 426B03 preamplifier. TEDS programmed

This model includes a 1/4" microphone cartridge, a mated preamplifier with TEDS, and system calibration. Click the following for individual component information.

  • Nominal Microphone Diameter: 1/4"
  • Frequency Response Characteristic: Free-Field
  • Frequency Range: (+2 / -3dB) 4 to 100000 Hz
  • Dynamic Range: 165 dB re 20 µPa

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Nominal Microphone Diameter1/4"1/4" 
Frequency Response Characteristic (at 0° incidence)Free-FieldFree-Field 
Sensitivity (±3 dB)-54 dB re 1 V/Pa-54 dB re 1 V/Pa[3] 
Sensitivity2.0 mV/Pa2.0 mV/Pa[3] 
Frequency Range (+2 / -3 dB)4 to 100000 Hz4 to 100000 Hz 
Frequency Range (±2 dB)5 to 80000 Hz5 to 80000 Hz 
Frequency Range (±1 dB)7 to 12500 Hz7 to 12500 Hz 
Lower Limiting Frequency (3 dB)0.75 to 4.0 Hz0.75 to 4.0 Hz 
Inherent Noise42 dB(A) re 20 µPa42 dB(A) re 20 µPa[1][4] 
Dynamic Range (3% Distortion Limit)165 dB re 20 µPa165 dB re 20 µPa[1] 
TEDS CompliantYesYes[2] 
Temperature Range (Operating)-40 to +176 °F-40 to +80 °C[5] 
Temperature Coefficient of Sensitivity (+14 to +158°F (-10 to +70°C))0.003 dB/°F0.006 dB/°C[1][3] 
Static Pressure Coefficient-0.009 dB/kPa-0.009 dB/kPa[1][3] 
Humidity Coefficient of Sensitivity (0 to 100%, non-condensing)±0.0014 dB/%RH±0.0014 dB/%RH[3] 
Influence of Axial Vibration (0.1g (1 m/s²))60 dB re 20 µPa60 dB re 20 µPa[1] 
Polarization Voltage0 V0 V[6] 
Excitation Voltage20 to 32 VDC20 to 32 VDC 
Constant Current Excitation2 to 20 mA2 to 20 mA 
Output Bias Voltage10 to 14 VDC10 to 14 VDC 
Maximum Output Voltage±8 Vpk±8 Vpk 
Output Impedance<50 Ohm<50 Ohm 
Housing MaterialStainless AlloyStainless Alloy 
Electrical Connector10-32 Jack 10-32 Jack  
Mounting Thread (Grid)0.25 - 60 UNS0.25 - 60 UNS 
Size - Diameter (with grid)0.28 in7.1 mm 
Size - Diameter (without grid)0.25 in6.35 mm 
Size - Height (with grid)2.07 in52.6 mm 
Size - Height (without grid)2.02 in51.3 mm 
Weight0.27 oz7.8 gm[1] 

All specifications are at room temperature unless otherwise specified.


Product Notes
[1] Typical.
[2] TEDS Capable Digital Communication, compliant with IEEE 1451.4
[3] re 250 Hz
[4] A-Weighted inherent noise is specified from 20 Hz - 20 kHz.
[5] Limited to 70°C if ICP current >10mA
[6] Prepolarized
[7] Venting through Preamp.
[8] See PCB Declaration of Conformance PS167 and PS076 for details.
ACS-63Calibration (with TEDS) of Precision Condenser Microphones and Preamplifiers together (mated pair).(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

Sound power measurements Part 1