25mm Cardioid Electret Microphone Cartridge

Cardioid Electret Microphone Cartridge 25mm

The ECM-B2583UML32-23861 is a 25 × 8.3 mm unidirectional electret mic capsule with -32dB±2 sensitivity and a 83dB SNR, suitable for professional karaoke microphones, live broadcasting microphones, and studio recording 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-B2583UML32-23861
Dimensions: 25 × 8.3 mm
Directivity: Unidirectional
Sensitivity: -32dB±2
Impedance: 15KΩ
S/N Ratio: 83dB
Max SPL: 120dB
Operating Voltage: 2Vdc
Frequency Response: 50Hz~20KHz

Tags: 25mm Electret High-SNR Mics Solder Pads Electret Vocal Mics

Technical Specifications

Our 2583 microphone core guarantees high-fidelity audio, boasting a distortion rate of 120dB THD≤1% and an impressive signal-to-noise ratio of 83dB.

Standard Test Circuit

ECM-B2583UML32-23861 Standard Test Circuit: 15kΩ load, 2V supply, 1μF output

Tested with a 15kΩ load resistor, 2V DC supply, and 1μF coupling capacitor.

Typical Frequency Response

ECM-B2583UML32-23861 Frequency Response Curve

Frequency response exhibits a noticeable rise from 3kHz to 5kHz, peaking clearly before a sharp drop-off starting around 6kHz, ensuring strong midrange presence with controlled high-frequency roll-off.

Dimensions (UNIT: mm)

Dimensions of ECM-B2583UML32-23861: Φ25×8.3mm

Large capsule measuring Φ25 × 8.3mm, featuring a rear acoustic inlet for enhanced sound pickup.

Packaging Overview

Standard packaging: 100 pcs per small box.
10 small boxes (1,000 pcs) are combined into one medium carton.
Several medium cartons are further packed into a large outer carton.
Pin-type microphones are protected with foam inside the small box.
Other types are packed directly or sealed in anti-static bags.

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.