EF-28321-116

Speakers Overview

The EF-28321-116 is a balanced armature speaker manufactured by Knowles. It features dimensions of 7.87 x 5.59 x 4.01 mm and an impedance of 195 ohms with the port located on the side. The device offers a sensitivity of 126 dB SPL/mW at 1 kHz.

Speakers Feature Summary

• Utilizes balanced armature technology for high-fidelity audio reproduction
• Features a side-mounted acoustic port design
• Provides high sensitivity output within a compact form factor

Speakers Applications

• Hearing aid receivers
• In-ear monitor transducers
• Specialty audio communication devices

Speakers Procurement Notes

Verify the specific revision level and packaging configuration directly with Knowles or authorized distributors before ordering. Ensure that the mechanical footprint and acoustic port orientation match the target application requirements to prevent integration issues.

Speakers Selection Notes

Select this component when a high-sensitivity, low-profile balanced armature transducer is required. Consider the 195-ohm impedance and side-port geometry during PCB layout and acoustic chamber design to ensure optimal performance and fit.

Speakers Part Context

Knowles is a primary developer of balanced armature technology used in hearing aids and specialty transducers. This model belongs to their line of miniature speakers designed for applications demanding precise audio output in constrained spaces.

Speakers Replacement Considerations

Consult official Knowles documentation for qualified substitute part numbers. Do not assume interchangeability with other balanced armature models due to potential differences in impedance, sensitivity, and mechanical dimensions.