Waterproof Microphone for Handheld Two-Way Radios

DM-1508 waterproof dynamic microphone capsule for handheld two-way radios

DM-1508 dynamic microphone capsule features: waterproof, unidirectional, 15×8 mm, mid-frequency boost

DM-1508 microphone capsule dimensions and frequency response curve (100–9000 Hz)

ECMIC microphones 12,000 m² factory with 6M+ units monthly output and ISO/CE certifications

ECMIC microphones automated production line overview, showing assembly and quality control process

Compact waterproof dynamic microphone with mid-frequency boost for clear voice in handheld two-way radios. Lightweight design ensures portability for industrial and outdoor use.

🚫 Factory direct sales only – no retail.
Minimum order quantities (MOQs) apply.
For intercom & headset makers
📞 Contact us for orders & inquiries.

🧪 Sample

Free (std. models) + shipping

🧭 Trial Order

From 200 pcs (1st order only)

📦 MOQ

3,000 pcs (mixed models allowed)

Model: ECM-DM1508KP250
Dimensions: 15 × 8 mm
Weight: 1.5 g
Directivity: Unidirectional
Sensitivity: -61 dB ± 3
Impedance: 250 Ω
Frequency Response: 100 Hz ~ 9000 Hz

Tags: 15mm Dynamic Intercom Mics

Technical Specifications

The ECM-DM1508K250 is a compact dynamic microphone capsule designed for voice-focused applications. With a frequency response of 100Hz to 9kHz, it emphasizes the vocal range, providing clear and intelligible speech, ideal for handheld two-way radios, headworn microphones, and portable voice systems.

Its unidirectional polar pattern reduces ambient noise, while the 250Ω impedance ensures compatibility with most amplification circuits and audio interfaces.

Lightweight and compact, the ECM-DM1508K250 integrates easily into portable or headworn devices, delivering stable performance in professional and everyday voice amplification scenarios.

Exploded View & Parts List

Exploded view of ECM-DM1508K250 dynamic microphone capsule

Includes sponge, cover, diaphragm, coil, magnetic steel, iron pot, holder, and PCB with solder.

Frequency Response Curve

Frequency response of ECM-DM1508K250

Frequency response spans 100Hz to 9kHz, offering balanced mids and a natural roll-off in the highs, ensuring clear voice reproduction for communication devices.

Dimensions (Unit: mm)

Dimensions of ECM-DM1508K250: Φ15×8.0mm

Dynamic microphone capsule with Φ15 × 8mm size, optimized for portable voice capture with mid-frequency clarity.

Reliability Tests

High Temperature Test: Microphone subjected to +60℃ ±3℃ for 96 hours with 20-50% humidity, followed by 6 hours of normal temperature lay.

Low Temperature Test: Microphone subjected to -25℃ ±3℃ for 96 hours with 20-50% humidity, followed by 6 hours of normal temperature lay.

Humidity Test: Microphone exposed to 40℃ and 90-95% relative humidity for 96 hours, followed by 6 hours of normal temperature lay.

Temperature Cycle Test: Microphone subjected to rapid temperature changes from normal temperature to +60℃ ±3℃ for 1 hour (normal temperature lay for 3 hours) and then to -25℃ ±3℃ for 1 hour (normal temperature lay for 3 hours).

Sensitivity Stability: Sensitivity remains within ±3dB of the initial sensitivity after each environmental test.

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.