Electret Microphone Insert without FET

ECM-B1655UL45-541 microphone circuit diagram and dimensions, showing key components and size

ECM-B1655UL45-541 microphone frequency response chart, showing sensitivity and performance across the frequency range

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

The ECM-B1660UL46-319 is a 16 × 6 mm unidirectional microphone capsule designed for broadcasting applications. With a sensitivity of -46dB±3 and a signal-to-noise ratio of 60dB, it ensures clear and precise sound capture, making it ideal for use in streaming and live broadcasting environments.

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🧭 Trial Order

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Model: ECM-B1660UL46-319
Dimensions: 16 × 6 mm
Directivity: Unidirectional
Sensitivity: -46 dB ± 3
Impedance: 680 Ω
S/N Ratio: 60 dB
Max SPL: 110 dB
Operating Voltage: 1.5 Vdc
Frequency Response: 100 Hz ~ 12 kHz
Current Consumption: 500 μA

Tags: 16mm Electret Non-FET Electret Solder Tabs Electret Vocal Mics

Technical Specifications

Our 1660 unidirectional electret microphone head offers high sensitivity and effective noise reduction, ensuring clear and precise audio capture.

Standard Test Circuit

Tested using RL=680Ω, VS=1.5V, and C=1μF configuration to simulate standard operating conditions.

Typical Frequency Response

Response rises from 100Hz to around 500Hz, remains relatively flat, dips between 4–5kHz, then begins to rise again beyond 5kHz.

Dimensions (UNIT: mm)

Appearance Dimension

Microphone capsule measures 16mm in diameter and 6mm in height, with external solder tabs and no internal FET circuit.

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.