Preamplifiers for Sound Level Meters

Preamplifiers for Models 831 and LxT

Larson Davis offers a number of microphone preamplifiers for a variety of applications. Ruggedly built, they can drive lines up to 500 feet.

 PRM831 PRMLxT1 PRMlxT1L PRMLxT2B PRMLxT2L
Diameter (inch) 0.5 0.5 0.5 0.5 0.5
Connector 5-pin
Swithcraft®
5-pin
Swithcraft®
5-pin
Swithcraft®
5-pin
Swithcraft®
5-pin
Swithcraft®
200 V Polarization No No No No No
Voltage (min) 15 V 6 V 6 V 6 V 6 V
Voltage (max) 36 V 15 V 15 V 15 V 15 V
Frequency 5 Hz to 126 kHz 4 Hz to 40 kHz 4 Hz to 40 kHz 10 Hz to 40 kHz 10 Hz to 20 kHz
Attenuation (typical) 0.08 dB 22.8 dB 1.2 dB 19 dB 19 dB
Noise
(typ A-weighted)
-1.6 µV -1.1 µV -1.8 µV 1.0 µV 1.8 µV
Input Impedance 10 GΩ 10 GΩ 10 GΩ 10 GΩ 10 GΩ
TEDS No No No No No