FFC-23981-I04

Speakers Overview

The Knowles FFC-23981-I04 is a ferrofluid-damped balanced armature receiver speaker designed for high-fidelity audio applications. It features a rectangular form factor with top porting and operates within a frequency range of 200 Hz to 4.4 kHz. The component has an impedance of 96 Ohms and delivers a sound pressure level efficiency of 100 dBA. Its physical dimensions are 5.18mm in length, 3.55mm in width, and it utilizes solder pad termination for surface mount integration.

Speakers Feature Summary

• Ferrofluid damping for enhanced mechanical stability and thermal management
• Balanced armature technology optimized for voice reproduction
• Top-port acoustic design for directional sound projection

Speakers Applications

• Hearing aids
• Bone conduction devices
• Medical diagnostic equipment

Speakers Procurement Notes

Verify the specific suffix 'I04' against official Knowles documentation to ensure correct impedance and acoustic tuning. Confirm RoHS compliance status as manufacturing processes may evolve. Check for end-of-life notices or alternative recommendations from the manufacturer before finalizing procurement plans.

Speakers Selection Notes

Select this component when a compact, high-efficiency receiver with precise impedance matching is required. The 96 Ohm specification suits circuits designed for low-current drive requirements. Ensure the enclosure allows for top-port airflow to maintain the specified frequency response and sound pressure levels.

Speakers Part Context

This model belongs to Knowles' line of precision micro-speakers and transducers. It is engineered for miniaturized audio systems where size constraints and acoustic clarity are critical. The ferrofluid construction distinguishes it from standard dry-armature receivers by offering improved power handling and reduced distortion.

Speakers Replacement Considerations

The FFC-26654-104 is documented as having similar characteristics but with a peak difference of 4 dB relative to this unit. Verify acoustic alignment and mounting compatibility before substituting.