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Larson Davis offers a number of microphone preamplifiers for a variety of applications. Ruggedly built, they can drive lines up to 500 feet.
| PRM821 | PRM721 | PRM831 | PRMLxT1 | PRMlxT1L | PRMLxT2B | PRMLxT2L | |
|---|---|---|---|---|---|---|---|
| Diameter (inch) | 0.5 | 0.5 | 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® | 5-pin Swithcraft® | 5-pin Swithcraft® |
| 200 V Polarization | No | No | No | No | No | No | No |
| Voltage (min) | 15 VDC | 15 VDC | 15 VDC | 6 VDC | 6 VDC | 6 VDC | 6 VDC |
| Voltage (max) | 36 VDC | 36 VDC | 36 VDC | 15 VDC | 15 VDC | 15 VDC | 15 VDC |
| Frequency | 5 Hz to 126 kHz | 5 Hz to 126 kHz | 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) | 0.8 dB | 0.8 dB | 0.08 dB | 22.8 dB | 1.2 dB | 19 dB | 19 dB |
| Noise (typ A-weighted) | 2.3 µV | 2.3 µV | -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 | 10 GΩ | 10 GΩ |
| TEDS | No | No | No | No | No | No | No |