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Product Detailed Parameters
- Description：SPEAKER 730OHM TOP PORT 126DB
- Series：BK
- Mfr：Knowles
- Package：Bulk
- Type：Receiver, Balanced Armature
- Technology：Magnetic
- Impedance：730 Ohms
- Power - Max：-
- Shape：Rectangular
- Termination：Solder Pads
- Size / Dimension：0.310" L x 0.220" W (7.87mm x 5.59mm)
- Height - Seated (Max)：0.310" (7.87mm)
- Frequency - Self Resonant：-
- Efficiency - dBA：126
- Efficiency - Testing：-
- Efficiency - Type：Sensitivity
- Port Location：Top
- Material - Cone：-
- Material - Magnet：-
- Ingress Protection：-
- Ratings：-
- Frequency Range：200 Hz ~ 4 kHz
- Power - Rated：-
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Overview
The Knowles BK-23134-000 is a balanced armature speaker designed for high-efficiency audio reproduction. It features a rectangular top port configuration and operates within a frequency range of 200 Hz to 4 kHz. The unit has an impedance of 730 Ohms and delivers a sound pressure level of 126 dB. Physical dimensions include a height of 5.59 mm with a footprint of 7.87 mm by 7.87 mm. The component utilizes electromagnetic technology for stable performance.
Feature Summary
- Balanced armature transducer design for high efficiency
- Rectangular top port acoustic output
- Electromagnetic technology for stability
Applications
- Hearing aids
- In-ear monitors
- Medical audio devices
Procurement Notes
Verify the specific datasheet revision when ordering, as mechanical drawings may be updated. Confirm that the 730 Ohm impedance matches the target circuit requirements. Ensure the 5.59 mm height fits within the designated enclosure space. Check for RoHS compliance status if required by local regulations. Validate the top port orientation against the device housing design.
Selection Notes
Select this component when high sensitivity and compact size are critical. The 730 Ohm impedance suits specific driver circuits requiring higher resistance loads. The balanced armature architecture provides detailed mid-range response suitable for voice applications. Consider the physical constraints of the 7.87 mm square footprint during PCB layout.
Part Context
This part belongs to Knowles' portfolio of miniature balanced armature speakers. These components are engineered for applications where space is limited but audio fidelity is essential. The series typically includes various impedance and sensitivity options to match different amplifier outputs.
Replacement Considerations
Direct substitutes must match the 730 Ohm impedance and 5.59 mm height. Verify that alternative models support the 200 Hz to 4 kHz frequency range. Ensure the rectangular top port geometry is compatible with existing acoustic tubes or nozzles.
