>Product Introduction
The SKC's preamplifier is a high performance preamplifier with low noise and high input impedance. The flat frequency response ensures high-precision acoustic measurement.
Among them, NP21 is used for 1/2-inch pre polarization measurement microphone. By adding adapter, 1-inch pre polarization measurement microphone can also be tested.
>Technical Parameter
The Preamplifier Of The Microphone |
Type | NP21 | NP22 | NP41 | NV21 |
Diameter | 1/2 inch | 1/2 inch | 1/4 inch | 1/2 inch |
Frequency Range | 5Hz-100kHz | 5Hz-100kHz | 5Hz-100kHz | 5Hz-100kHz |
(Reference: 250Hz,0.2dB) |
Damping(10Hz-100KHz) | <0.5dB | <0.5dB | <0.5dB | <0.5dB |
Input Impedance | >5GΩ | >5GΩ | >1.5GΩ | >5GΩ |
Output Impedance | <110Ω | <110Ω | <110Ω | <110Ω |
Electrical Noise | A-weighted <2.0μV | A-weighted <2.0μV | A-weighted <2.0μV | A-weighted <2.0μV |
20Hz-20kHz <6.0 μV | 20Hz-20kHz <6.0 μV | 20Hz-20kHz <6.0μV | 20Hz-20kHz <6.0μV |
Maximum Output Voltage | 8.0 Vrms | 8.0 Vrms | 8.0 Vrms | 10.0 Vrms |
Power Supply Mode | IEPE(2-20)mA | IEPE(2-20)mA | IEPE(2-20)mA | IEPE(2-20)mA |
Operating Temperature | -40℃-100℃ | -40℃-100℃ | -40℃-100℃ | -40℃-100℃ |
Operating Humidity | 0～98%RH | 0～98%RH | 0～98%RH | 0～98%RH |
Output Interface | BNC | SMB | SMB | Seven Core Lemo |
Length（mm） | 84.5 | 35 | 58 | 80 |
Weight（g） | 25.5 | 14.5 | 6.5 | 28 |
