All-round Outstanding Preamplifier! Three Technological Breakthroughs Eliminate Application Limitations
2026-05-22Product Introduction
Developed by BSWA, MA221ADY 1/2 inch preamplifier is tailored for pre-polarized microphones. It acts as a reliable signal transmission hub ideal for low-frequency noise measurement.
Three Core Product Strengths
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Full-scenario Compatibility
Suitable for microphones of various sizes. Built-in +2.5V bias voltage ensures seamless connection with mainstream single-supply data acquisition instruments.
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Premium Signal Performance
Equipped with 8-order customizable low-pass filter. Cutoff frequency adjustable to filter high-frequency interference and capture target signals precisely.
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Flexible Practical Design
Comes with 1-meter standard cable. Customizable cable length and output interface adapt to diverse spatial limits and interface standards.
Reliable Partner for Acoustic Testing System
Wide Microphone Adaptation
Natively matches 1/2 inch pre-polarized microphones and MP series products. Equipped with dedicated adapter, it also supports 1/4 inch pre-polarized microphones for flexible device switching1.
High-efficiency Impedance Conversion
Reduces Gigaohm-level output impedance of microphone to below 100 ohms. Eliminates signal attenuation and interference caused by impedance mismatch, preserving complete acoustic details during long-distance transmission.
High-fidelity Signal Processing
Wide frequency coverage ensures accurate and stable signal output. Frequency response covers 2.5Hz~12.5kHz with tolerance within ±0.5dB and typical attenuation of 0.3dB. Custom signal attenuation prevents overload and improves testing accuracy2.
Typical Application Scenarios
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Environmental Acoustic Monitoring
Accurately collects low-frequency noise from traffic and industrial facilities. High precision helps analyze noise impact on human health.
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Industrial Equipment Condition Monitoring
Stably operates under harsh working conditions. Real-time monitors abnormal vibration and noise of fans, pipelines and machine tools to predict potential mechanical faults.
Core Technical Specifications
| Parameter | Specification |
|---|---|
| Polarization Voltage | 0V (Pre-polarized) |
| Frequency Response | 4~10kHz (±0.2dB), 2.5~12.5kHz (±0.5dB) |
| Maximum Output Voltage | ±2.5Vp |
| DC Bias Voltage | 2.5V |
| Output Impedance | ＜30Ω |
FAQ
Q: What microphones can MA221ADY work with?
A: It fits 1/2 inch pre-polarized microphones directly, and supports 1/4 inch models with matched adapter.
Q: What advantages does impedance conversion bring?
A: It avoids signal loss and disturbance, guarantees intact signal transmission over long distance.
Q: Which testing field is this preamplifier applicable to?
A: Widely used in environmental noise detection and industrial equipment vibration monitoring.
References
1 BSWA Microphone and Preamplifier Matching Specification
2 Low Frequency Acoustic Signal Processing Technical Standard
