Model: 426A13

$550.00 USD
(Pricing valid in US only)


Short preamplifier for 1/2" Prepolarized microphones

  • Nominal Microphone Diameter: 1/2"
  • Temperature Range: -40 to 158 °F (-40 to 70 °C)
  • Output Voltage: ±8 V
  • Size - Length: 1.4 in (35.7 mm)

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Nominal Microphone Diameter1/2"1/2" 
Gain-0.20 dB-0.20 dB[1][2] 
Frequency Response (±0.2 dB) (re 1 kHz)10 to 126000 Hz10 to 126000 Hz 
Frequency Response (-3 dB) (re 1 kHz)<0.6 Hz<0.6 Hz 
Phase Linearity (<1 °)63 to 20000 Hz63 to 20000 Hz 
Electrical Noise (A-weight)<3 µV<3 µV[2] 
Electrical Noise (A-weight)2.1 µV2.1 µV[1][2] 
Electrical Noise (Flat 20 Hz to 20 kHz)<6 µV<6 µV[2] 
Electrical Noise (Flat 20 Hz to 20 kHz)3.5 µV3.5 µV[1][2] 
Distortion (3 V rms input at 1 kHz)<-70 dB<-70 dB 
Output Slew Rate2 V/µS2 V/µS[1] 
TEDS CompliantYesYes[3] 
Temperature Range (Operating)-40 to 158 °F-40 to 70 °C 
Temperature Range (Storage)-40 to 185 °F-40 to 85 °C 
Temperature Response<0.03 dB<0.03 dB 
Humidity Range (Non-Condensing)0 to 95 %RH0 to 95 %RH 
Humidity Sensitivity<0.03 dB<0.03 dB 
Excitation Voltage20 to 32 VDC20 to 32 VDC 
Constant Current Excitation2 to 20 mA2 to 20 mA 
Impedance (Input)20000000000 Ohm20000000000 Ohm[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±8 V±8 V[1] 
Housing MaterialStainless SteelStainless Steel 
Size - Diameter0.5 in12.7 mm 
Size - Length1.4 in35.7 mm 
Weight0.13 oz3.6 gm 
Electrical Connector10-32 Coaxial Jack10-32 Coaxial 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] Measured with an 18 pF reference microphone.
[3] TEDS Capable Digital Memory and Communication, compliant with IEEE P1451.4, uses DS2431.
[4] See PCB Declaration of Conformance PS076 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