TYPE 2669-L

½-inch microphone preamplifier, tapered, incl. cable, 7-pin LEMO connector

This ½" microphone preamplifier operates over a wide range of temperature, humidity and other environmental conditions.

見積もり依頼

This ½" microphone preamplifier operates over a wide range of temperature, humidity and other environmental conditions.

USE SCENARIOS

  • Sound measurements with Brüel & Kjær 1/2" (1", 1/4" and 1/8" with adaptor) and compatible microphones
  • General-purpose preamplifier and high-impedance input probe for Brüel & Kjær measuring instruments

FEATURES

  • The preamplifier, cable and its connectors all fulfil electromagnetic compatibility (EMC) requirements
  • Compact LEMO connector at preamplifier. Connector: lemo 0B 7 pin & lemo 0B to lemo 1B
  • Patented charge-injection calibration technique for on-site calibration of the whole measuring channel including the microphone
  • Wide dynamic range
  • Very low inherent noise, high input impedance
  • Low output impedance and high output current allows use with long extension cables
  • Wide working temperature range

The preamplifier has a very high input impedance presenting virtually no load to the microphone. The high output voltage together with an extremely low inherent noise level gives a wide dynamic range. The preamplifier’s low output impedance allows the use of long extension cables without problems. You can connect ½" microphones directly and 1", ¼" and 1/8" types using adaptors.

You can verify the condition of the microphone, preamplifier and cable on-site using its patented charge injection calibration technique.
Diameter
1/2
Optimised for
Acoustical
Connector at preamplifier
LEMO 0B, 7-pin
Connector at instrument/cable
LEMO 1B, 7-pin
Calibration facility
Charge Injection Calibration
Polarization voltage support
Yes
Supply voltage
± 14 to ± 60
Max output voltage (peak)
55
Max output current (peak)
20
Frequency range
3 to 200000
Attenuation
< 0.35
Noise A-weighted, typical
1.9
Noise 22,4 Hz to 300 kHz, typical
8.2
Input impedance
15||0.3
TEDS UTID
1025 from serial number 2221155