High-Performance Uni Electret Mic Capsule for Hi-Fi Audio Systems

Uni Electret Mic Capsule for Hi-Fi Audio Systems High-Performance

High-performance 10 × 4.5 mm unidirectional electret microphone capsule with a 125dB max SPL, ideal for high-volume applications like headsets and audio equipment.

🚫 Factory direct sales only – no retail.
Minimum order quantities (MOQs) apply.
Suitable for brand owners and manufacturers only.
📞 Please contact us to discuss your project and order details.

🧪 Sample

Free sample – shipping extra

🧭 Trial Order

From 500 pcs (1st order only)

📦 MOQ

5,000 pcs (mixed models allowed)

Model: ECM-B1045UML50-25082
Dimensions: 10 × 4.5 mm
Directivity: Unidirectional
Sensitivity: -50dB±2
Impedance: 2KΩ
S/N Ratio: 65dB
Max SPL: 125dB
Operating Voltage: 2Vdc
Frequency Response: 100Hz~10KHz

Tags: 10mm Electret Conference Mics Solder Pads Electret

Technical Specifications

The ECM-B1045UML50-25082 is a high-fidelity unidirectional electret microphone capsule, featuring a 10 × 4.5 mm design tailored for clear sound capture in headsets and other audio devices. With a -50dB sensitivity and a wide frequency response range of 100Hz to 10KHz, it delivers excellent audio quality for applications demanding precise sound reproduction.

The microphone’s low impedance (2KΩ) and solid 65dB signal-to-noise ratio ensure clear, consistent audio performance even in noisy environments. The high maximum SPL of 125dB makes it suitable for high-volume applications, while its operating voltage of 2Vdc ensures compatibility with a variety of audio equipment.

This microphone capsule is perfect for Hi-Fi audio systems, professional headsets, and any application where high-quality, detailed sound reproduction is crucial.

Standard Test Circuit

ECM-B1045UML50 Test Circuit: 15kΩ bias, 2V supply, 1μF output

15kΩ bias resistor, 2V DC supply, 1μF output capacitor. High-impedance microphone configuration.

Typical Frequency Response

ECM-B1045UML50 Frequency Response: 100Hz-2kHz dip, 2k-10kHz rise, then attenuation

Frequency response features 100Hz-2kHz attenuation with 2k-10kHz emphasis and high-end roll-off.

Dimensions (Unit: mm)

ECM-B1045UML50 Dimensions: Φ10×4.5mm with front dust mesh and rear sound inlet

Compact Φ10×4.5mm housing with dual-port acoustic design.

Reliability Tests

High Temperature Test: Microphone subjected to +80℃ for 100 hours, followed by 3 hours at room temperature.

Low Temperature Test: Microphone subjected to -40℃ for 100 hours, followed by 3 hours at room temperature.

Humidity & Heat Test: Microphone exposed to +55℃ and 85% relative humidity for 100 hours, followed by 3 hours at room temperature.

Thermal Shocking Test: Microphone subjected to [+80℃ 0.5H → room temp 1H → -40℃ 0.5H → room temp 1H] for 10 cycles, then exposed to room temperature for 3 hours.

Vibration Test: Microphone subjected to two hours of vibration in x, y, and z directions with frequencies of 10-55Hz and a 1.52mm amplitude.

Drop Test: Microphone dropped 5 times from a height of 1.0 meter onto a slippery marble floor, without packaging, and still performs normally.

Storage and Operating Temperature Range: Suitable for environments ranging from -35℃ to +60℃.

Sampling Process

Confirm customer requirements:

Review product application, microphone capsule specifications, usage scenarios, and sound quality needs.

Recommend and specify:

Provide recommended microphone capsule models and detailed specifications for customer evaluation.

Sample provision and testing:

Deliver microphone samples for customer testing and feedback purposes.

Optimize and finalize:

Refine microphone design based on feedback, finalize samples, and proceed to mass production upon quality approval.

Quality Assurance

Conducting sampling inspections of incoming materials to ensure compliance with standard requirements.

Performing inspection audits to ensure the stability and control of the entire manufacturing process.

Conducting pre-shipment inspections to ensure that products meet established quality standards.

Acoustic Laboratory

Testing of background noise, sensitivity, frequency response curve, and directionality indicators.

Verification of the impact of different circuits, structural dimensions, materials, and processes on indicators.

Reliability testing at both the new product design stage and the mass production regular stage.

Automatic Workshop

Utilizing fully automated production lines to ensure high efficiency and consistency.

Equipped with state-of-the-art facilities, including a 10,000-level dust-free workshop.

Employing a rigorous 21-step process to guarantee product stability.