Microphone Preamplifiers

2671 CCLD Microphone Preamplifier

2671 CCLD Microphone Preamplifier

CCLD Microphone Preamplifier Type 2671 enables you to make acoustical measurements with a CCLD input module. You can connect ½″ prepolarized microphones to the preamplifier. The robust, compact design means that you can use Type 2671 over a wide range of environmental conditions and in confined spaces.


  • Low price, multichannel sound measurement setups with ½” Brüel & Kjær prepolarized condenser microphones
  • Multichannel signal analysis measurements
  • Multichannel sound power measurements
  • Industrial machinery noise measurements


  • ICP® compatible
  • BNC connector for easy installation and use with inexpensive BNC cables
  • Connects directly to sockets and to Brüel & Kjær microphone sockets with adaptor
  • Low output impedance so that long extension cables can be used
  • Supports “Smart transducer Interface” IEEE P 1451.4 containing TEDS (Transducer Electronic Data Sheet)


Diameter: 1/2
Optimised for: CCLD
Connector at preamplifier: BNC
Supply voltage: 28
Max output voltage (peak): 7
Max output current (peak): 19
Frequency range: 20-50000
Attenuation: <0.35
Noise A-weighted, typical: 4
Noise 22,4 Hz to 300 kHz, typical: 15
Input impedance: 1.5||0.4
TEDS UTID: 1025 from serial number 2264319