Microphone Preamplifiers

2699 DeltaTron CCLD Microphone Preamplifier

2699 DeltaTron CCLD Microphone Preamplifier

Type 2699 uses a built-in, A-weighting filter to eliminate low-frequency disturbance caused by body boom and road noise which would otherwise be a source of error during in-car measurements. Its robust, compact design means that you can use Type 2699 in a wide range of environmental conditions.


  • In-car measurements to ANSI S 1.4, IEC 60651 and IEC 61672 standards
  • General sound measurements


  • Connects directly to CCLD input
  • Current output allows use of long, inexpensive, coaxial cables
  • Built-in, A-weighting filter for in-car noise-signal reduction
  • Dual-polarity overload-detection facility
  • Low noise and high dynamic range
  • CE and Australian C-tick compliance


Diameter: 1/2
Optimised for: A-weighted CCLD
Connector at preamplifier: BNC
Supply voltage: 28
Max output voltage (peak): 7
Max output current (peak): 18
Frequency range: A-weighted
Attenuation: < 0.3
Noise A-weighted, typical: 8
Input impedance: 10||0.5
TEDS UTID: 1025 from serial number 2264319