BK-28385-000

Overview

The Knowles BK-28385-000 is a balanced armature speaker designed for compact audio applications. It features an electromagnetic transducer mechanism housed in a rectangular package. The component is engineered to deliver superior fidelity and treble performance while maintaining a lightweight profile. It operates within a low-power consumption range, making it suitable for battery-powered devices. The unit provides high power output relative to its size, supporting efficient sound reproduction in space-constrained environments.

Feature Summary

• Balanced armature transducer technology
• Rectangular housing design
• High fidelity and treble performance
• Compact and lightweight construction

Applications

• Mobile communication devices
• Wireless headsets
• Portable audio players
• Hearing aids
• Smart wearable electronics

Procurement Notes

Verify the specific datasheet version from Knowles or authorized distributors to confirm mechanical dimensions and acoustic parameters. Ensure compatibility with existing PCB layouts due to the rectangular form factor. Check RoHS compliance status if required by regional regulations. Confirm lead times with suppliers as standard delivery periods may vary based on production schedules and inventory levels.

Selection Notes

Select this component when space constraints are critical and high-frequency response is prioritized. The balanced armature design offers efficiency advantages over dynamic speakers in small enclosures. Evaluate the trade-off between physical size and acoustic output requirements. Ensure the driving circuitry matches the impedance and sensitivity specifications of the balanced armature type.

Part Context

This part belongs to the Knowles speaker and transducer family, specifically utilizing balanced armature technology. It is distinct from dynamic moving-coil speakers, offering different acoustic characteristics suited for high-fidelity voice and music reproduction in miniature formats. The rectangular package distinguishes it from circular balanced armature variants.

Replacement Considerations

Direct substitutes must match the balanced armature architecture and rectangular footprint. Verify equivalent electrical impedance and sensitivity ratings to maintain system performance. Mechanical mounting hole patterns and terminal configurations should be identical to ensure seamless integration without PCB redesign.