EH-27318-000

Speakers Overview

The Knowles EH-27318-000 is a rectangular balanced armature receiver speaker. It features an impedance of 180 Ohms and a sound pressure level of 98.5 dB. The frequency range spans from 200 Hz to 4.5 kHz. The physical dimensions are 5.18mm in length, 3.55mm in width, with a maximum seated height of 0.120 inches (approximately 3.05mm). The component utilizes magnetic technology and is RoHS compliant.

Speakers Feature Summary

• Balanced armature transducer design for high efficiency audio reproduction
• Rectangular form factor suitable for compact electronic assemblies
• High sensitivity rating of 98.5 dB for clear audio output

Speakers Applications

• Hearing aids
• Medical diagnostic equipment
• Industrial communication devices

Speakers Procurement Notes

Verify the specific revision status and RoHS compliance documentation directly with Knowles or authorized distributors before procurement. Ensure that the 180 Ohm impedance matches the driving circuit requirements. Confirm that the rectangular package dimensions fit within the designated enclosure space without mechanical interference.

Speakers Selection Notes

Select this component when a high-sensitivity, low-power audio solution is required for space-constrained applications. The 180 Ohm impedance may require specific driver matching compared to standard 32 Ohm speakers. Consider the 200 Hz lower frequency limit when evaluating bass response needs for the target application.

Speakers Part Context

This part belongs to the Knowles EH series of balanced armature receivers. These components are engineered for precision audio applications where size and power consumption are critical constraints. The series offers various impedance and sensitivity options to suit different acoustic environments and driver configurations.

Speakers Replacement Considerations

Direct substitutes must match the 180 Ohm impedance, 98.5 dB sensitivity, and rectangular footprint. Verify frequency response curves to ensure compatibility with the original acoustic design. Consult Knowles for updated equivalent parts if discontinuation occurs.