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Product Detailed Parameters
- Description：SPEAKER 320OHM 123DB RECT
- Series：BK
- Mfr：Knowles
- Package：Bulk
- Type：Receiver, Balanced Armature
- Technology：Magnetic
- Impedance：320 Ohms
- Power - Max：-
- Shape：Rectangular
- Termination：Solder Pads
- Size / Dimension：-
- Height - Seated (Max)：-
- Frequency - Self Resonant：-
- Efficiency - dBA：123
- Efficiency - Testing：-
- Efficiency - Type：-
- Port Location：-
- Material - Cone：-
- Material - Magnet：-
- Ingress Protection：-
- Ratings：-
- Frequency Range：-
- Power - Rated：-
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Overview
The Knowles BK-28510-000 is a rectangular balanced armature receiver transducer designed for audio applications. It features an impedance of 320 ohms and delivers an efficiency of 123 dBA. The component utilizes magnetic technology and is supplied in bulk packaging. Its physical dimensions are approximately 7.87 x 5.59 x 4.04 mm, making it suitable for compact electronic devices requiring high-efficiency sound reproduction.
Feature Summary
- Balanced armature driver configuration for precise audio output
- High efficiency rating of 123 dBA for effective sound projection
- Rectangular form factor optimized for space-constrained designs
- Magnetic technology implementation for stable operation
Applications
- In-ear monitor systems
- Hearing aid devices
- Compact audio receivers
Procurement Notes
Verify the obsolete part status before procurement planning. Confirm dimensional tolerances against enclosure design requirements. Ensure compatibility with 320-ohm drive circuits. Check for RoHS compliance documentation if required by regional regulations. Validate supplier authenticity due to potential availability constraints.
Selection Notes
Select this component when high sensitivity is prioritized over low impedance matching. The 320-ohm impedance requires specific amplifier considerations compared to standard 16-ohm drivers. Evaluate spatial constraints as the rectangular shape dictates orientation within the housing. Consider the balanced armature nature for frequency response characteristics distinct from dynamic drivers.
Part Context
This model belongs to Knowles' portfolio of precision audio transducers. Balanced armature receivers are commonly used in professional audio and medical hearing solutions where clarity and efficiency are critical. The BK series typically targets applications demanding reliable performance in small form factors.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct replacements may require evaluating equivalent balanced armature drivers with similar impedance and sensitivity specifications.
