6mm Small Diaphragm Microphone Capsule for Instrument Recording

Small Diaphragm Microphone Capsule for Instrument Recording 6mm

ECM-B6027AL30-331 microphone circuit diagram and dimensions, showing key components and size

ECM-B6027AL30-331 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-B6027AL30-331 is a 6 × 2.7 mm omnidirectional microphone capsule ideal for instrument recording. It features a sensitivity of -30dB±2 and a signal-to-noise ratio of 70dB, ensuring excellent audio clarity and consistency. This microphone captures sound from all directions, making it suitable for high-quality recording of various musical instruments.

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Model: ECM-B6027AL30-331
Dimensions: 6 × 2.7 mm
Directivity: Omnidirectional
Sensitivity: -30 dB ± 2
Impedance: 2.2 kΩ
S/N Ratio: 70 dB
Max SPL: 110 dB
Operating Voltage: 2 Vdc
Frequency Response: 50 Hz ~ 20 kHz
Current Consumption: 500 μA

Tags: 6mm Electret Instrument Mics Solder Pads Electret

Technical Specifications

Our 6027 omnidirectional microphone head delivers smooth frequency response with high sensitivity, a high signal-to-noise ratio, and excellent fidelity.

Standard Test Circuit

Test conditions: RL = 2.2kΩ, Vs = 2V, C = 1μF

Typical Frequency Response

Frequency response ranges from 50Hz to 20kHz. The curve remains flat through the low and mid frequencies, then rises in the high-frequency region before gradually rolling off.

Dimensions (UNIT: mm)

Appearance Dimension

Capsule measures 6mm in diameter and 2.7mm in height. The front side features a dustproof mesh, while the back is fully sealed without an acoustic port.

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.