Model: 426A10

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1/2" ICP® preamplifier with 20 Hz high pass filter (for prepolarized microphones)

  • Nominal Microphone Diameter: 1/2"
  • Temperature Range: -40 to +176 °F (-40 to +80 °C)
  • Output Voltage: ±7 Vpk
  • Size - Length: 3.18 in (80.7 mm)

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Nominal Microphone Diameter1/2"1/2" 
Gain-0.1 dB-0.1 dB[1][3] 
Frequency Response (±0.1 dB) (re 1 kHz)80 to 125000 Hz80 to 125000 Hz 
Frequency Response (-3 dB) (re 1 kHz)<10 Hz<10 Hz 
Phase Linearity (<1 °)500 to 20000 Hz500 to 20000 Hz 
Phase Linearity (-1 to +10 °)50 to 500 Hz50 to 500 Hz 
Electrical Noise (A-weight)<3.6 µV<3.6 µV[3] 
Electrical Noise (A-weight)2.6 µV2.6 µV[1][3] 
Electrical Noise (Flat 20 Hz to 20 kHz)<11.2 µV<11.2 µV[3] 
Electrical Noise (Flat 20 Hz to 20 kHz)7.8 µV7.8 µV[1][3] 
Distortion (3 V rms input at 1 kHz)<-70 dB<-70 dB 
Output Slew Rate2 V/µS2 V/µS[1] 
TEDS CompliantYesYes[2] 
Temperature Range (Operating)-40 to +176 °F-40 to +80 °C 
Temperature Response<0.05 dB<0.05 dB 
Humidity Range (Non-Condensing)0 to 95 %RH0 to 95 %RH 
Humidity Sensitivity<0.05 dB<0.05 dB 
Excitation Voltage20 to 32 VDC20 to 32 VDC 
Constant Current Excitation2 to 20 mA2 to 20 mA 
Impedance (Input)2 GOhm2 GOhm[1] 
Capacitance (Input)0.2 pF0.2 pF[1] 
Output Bias Voltage10 to 14 VDC10 to 14 VDC 
Impedance (Output)<50 Ohm<50 Ohm 
Output Voltage (Maximum)±7 Vpk±7 Vpk 
Housing MaterialStainless SteelStainless Steel 
Size - Diameter0.5 in12.7 mm 
Size - Length3.18 in80.7 mm 
Weight1.34 oz38 g[1] 
Electrical ConnectorBNC JackBNC Jack 
Mounting Thread (Microphone to Preamplifier)0.4606 - 60 UNS11.7 mm - 60 UNS 

All specifications are at room temperature unless otherwise specified.


Product Notes
[1] Typical.
[2] TEDS Capable Digital Memory and Communication, compliant with IEEE P1451.4
[3] Measured with an 18 pF reference microphone.
[4] See PCB Declaration of Conformance PS073 for details.
ERC-16Calibration of microphone preamplifier(1)
Optional Versions:
No optional versions
Product Documents
Additional Downloads
Microphone - Safe Handling and Maintenance

Prepolarized vs. externally polarized microphones