MA411A preamplifier Introduction: The MA411A preamplifier is a 1/4 "ICCP powered preamplifier suitable for MP series 1/4" pre polarized microphones. It is a low-noise, high-quality preamplifier that can be used in various acoustic testing scenarios. Among them, MA411A is the SMB interface, and MA411B is the 10-32 interface. The main function of a preamplifier is impedance variation, as the output impedance of a microphone exceeds G Ω and cannot be directly connected to commonly used data acquisition devices. The high input impedance and low output impedance of the preamplifier can reduce the output impedance of the microphone to below 100 Ω. Technical parameters: Model: MA411A Diameter: 1/4“ Polarization voltage: 0V (pre polarized) Frequency response (Hz) (± 0.2 dB): 2.5~70 k Attenuation (dB): 0.3 (typical) Maximum output voltage (Vp): ± 8 Self generated noise: A-weighted<3 μ V (2.5 μ V typical) 20 Hz~20 kHz<10 μ V (6 μ V typical) Input impedance (G Ωǁ pF): 15 ǁ 0.4 Output impedance (Ω):<30 Power supply mode: ICCP (2mA~20mA, 4mA typical) DC bias voltage (V): 12 ± 2 Temperature range for use (° C): -30~80 Humidity range (% RH): 0~95 Size (mm): Ø 7 × 55 Microphone connection thread: Ø 5.7-60 UNS-2A Output connector: SMB Weight (g): 5.8 TEDS: Optional, compliant with IEEE 1451.4 (default v0.9, optional v1.0)
Introduction: The MA411A preamplifier is a 1/4 "ICCP powered preamplifier suitable for MP series 1/4" pre polarized microphones. It is a low-noise, high-quality preamplifier that can be used in various acoustic testing scenarios. Among them, MA411A is the SMB interface, and MA411B is the 10-32 interface. The main function of a preamplifier is impedance variation, as the output impedance of a microphone exceeds G Ω and cannot be directly connected to commonly used data acquisition devices. The high input impedance and low output impedance of the preamplifier can reduce the output impedance of the microphone to below 100 Ω.
