CI-28487-000

Overview

The Knowles CI-28487-000 is a balanced armature receiver designed for acoustic applications. It operates within a frequency range of 200 Hz to 5.5 kHz. The component features an impedance of 69 Ohms and delivers a sound pressure level of 128 dBA. It utilizes a top rectangular port configuration with a depth of 4.1 mm. This device is engineered for mid-range audio performance in compact electronic assemblies.

Feature Summary

• Balanced armature transducer architecture
• Top rectangular port design
• Optimized for mid-range audio frequencies

Applications

• Mid-range audio signal transmission
• Compact acoustic receiver modules
• Portable electronic device speakers

Procurement Notes

Verify the specific impedance rating required for your circuit, as sources indicate values of 69 Ohms and 100 Ohms. Confirm the sound pressure level specification matches your application needs, noting variations between 128 dBA and 131.5 dB across different documentation. Ensure the physical dimensions and port type align with your enclosure constraints before finalizing procurement.

Selection Notes

Select this component when a balanced armature receiver is required for mid-range audio tasks. Consider the physical depth and port orientation for integration into tight spaces. Evaluate the acoustic output requirements against the available specifications to ensure adequate volume and frequency response for the intended use case.

Part Context

This part belongs to the Knowles CI series of speakers and transducers. The series focuses on providing reliable acoustic solutions for various consumer electronics. The CI-28487-000 specifically addresses the need for compact, high-performance receivers in modern devices requiring clear mid-range audio reproduction.

Replacement Considerations

No public confirmed substitute part numbers are available.