BK-21615-000

Overview

The Knowles BK-21615-000 is a balanced armature receiver speaker designed for audio applications. It features a rectangular top port configuration and operates within a frequency range of 200 Hz to 4 kHz. The component has an impedance of 1.2 kOhms and delivers a sound pressure level of 126 dB. Its physical dimensions are 7.87 mm in length, 5.59 mm in width, and a maximum seated height of 7.87 mm.

Feature Summary

• Balanced armature transducer technology
• Top port acoustic design
• High sensitivity output

Applications

• Hearing aids
• Bone conduction devices
• Medical audio equipment

Procurement Notes

Verify the specific port orientation (top vs. side) as datasheets may vary between 126 dB top port and 118 dB side port variants. Confirm impedance matching requirements with the host circuitry. Ensure mechanical clearance accommodates the 7.87 mm height dimension during integration.

Selection Notes

Select this model for applications requiring high fidelity in compact spaces. The 1.2 kOhm impedance suits specific driver interfaces. Evaluate the 200 Hz to 4 kHz bandwidth against target audio response needs. Consider the rectangular form factor for PCB layout constraints.

Part Context

This component belongs to Knowles' portfolio of precision audio transducers. Balanced armature speakers are standard in miniaturized hearing solutions due to their efficiency and size. The BK series represents established designs for reliable acoustic performance in medical and consumer electronics.

Replacement Considerations

Check for compatible sub-variants like BK-21615-052 which differs by impedance and port location. Ensure mechanical footprint compatibility before substitution.