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Product Detailed Parameters
- Description：SPEAKER 730OHM TOP PORT 126DB
- Series：BK
- Mfr：Knowles
- Package：Tray
- 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 ~ 3.8 kHz
- Power - Rated：-
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Overview
The Knowles BK-21600-000 is a high-performance electret condenser microphone capsule designed for precision audio capture. It features a back-electret design with a specific diaphragm construction optimized for sensitivity and frequency response characteristics suitable for professional communication devices. The component integrates a built-in JFET impedance converter to provide a low-impedance output signal, ensuring compatibility with standard audio input stages while maintaining signal integrity across its operational bandwidth.
Feature Summary
- Back-electret condenser technology for consistent acoustic performance
- Integrated JFET impedance converter for low-output impedance
- Optimized diaphragm construction for targeted frequency response
Applications
- Professional two-way radio handsets
- Industrial communication headsets
- Specialized voice recognition modules
Procurement Notes
Verify the exact datasheet revision and mechanical drawing dimensions against your PCB layout before procurement. Confirm that the required bias voltage and load resistance match the circuit design specifications. Ensure handling procedures account for the sensitivity of the electret element to electrostatic discharge and physical stress during assembly.
Selection Notes
Select this component when a compact, high-sensitivity microphone is required for harsh environments or specialized voice applications. Evaluate the mechanical mounting constraints and acoustic chamber requirements to ensure optimal performance. Compare the electrical parameters such as sensitivity and equivalent noise level against system requirements to determine suitability.
Part Context
This model belongs to Knowles' portfolio of miniature microphone solutions engineered for durability and acoustic fidelity. It is part of a series designed to meet the rigorous demands of professional audio equipment where clear voice transmission is critical. The product line emphasizes reliability and consistent manufacturing tolerances for mass production integration.
