EF-27985-000

Speakers Overview

The Knowles EF-27985-000 is a compact speaker transducer designed for high-efficiency audio output in space-constrained applications. It features an impedance of 345 Ohms and delivers a sensitivity of 126 dB. The operational frequency range extends from 200 Hz to 6.3 kHz. Physical dimensions are approximately 7.87 mm by 5.59 mm with a depth of 4.01 mm, incorporating a side port configuration.

Speakers Feature Summary

• High acoustic efficiency with 126 dB sensitivity rating
• Compact form factor suitable for miniaturized electronics
• Side port design for directional sound projection

Speakers Applications

• Portable consumer electronic devices
• Medical diagnostic equipment
• Industrial control panels

Speakers Procurement Notes

Verify the specific datasheet version to confirm exact dimensional tolerances and acoustic performance curves. Ensure compatibility with driving circuits given the 345 Ohm impedance load. Confirm RoHS compliance status if required for your manufacturing process. Cross-reference the part number with official Knowles documentation to avoid substitution errors.

Speakers Selection Notes

Select this component when high sensitivity is critical within a small footprint. The 345 Ohm impedance requires appropriate amplifier matching. Consider the side port orientation during mechanical layout. Evaluate the 200 Hz to 6.3 kHz bandwidth against target audio requirements.

Speakers Part Context

This model belongs to the Knowles speakers and transducers category. It represents a specialized solution for audio output where size and efficiency are prioritized over low-frequency extension. The product line focuses on precision acoustic components for professional and industrial markets.

Speakers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify electrical and mechanical compatibility before considering alternative sources.

Speakers FAQ

What is the impedance of the EF-27985-000?

The impedance is 345 Ohms.

What is the sensitivity rating?

The sensitivity is 126 dB.

Does it have a top or side port?

It features a side port configuration.