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Product Detailed Parameters
- Description：SPEAKER 360OHM TOP PORT 110DB
- Series：CM
- Mfr：Knowles
- Package：Bulk
- Type：Receiver, Balanced Armature
- Technology：Magnetic
- Impedance：360 Ohms
- Power - Max：-
- Shape：Round
- Termination：Flex Contacts
- Size / Dimension：0.651" Dia (16.54mm)
- Height - Seated (Max)：0.330" (8.38mm)
- Frequency - Self Resonant：-
- Efficiency - dBA：110
- Efficiency - Testing：-
- Efficiency - Type：-
- Port Location：Top
- Material - Cone：-
- Material - Magnet：-
- Ingress Protection：-
- Ratings：-
- Frequency Range：100 Hz ~ 5 kHz
- Power - Rated：-
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Overview
The Knowles CM-28452-000 is a balanced armature receiver speaker designed for surface-mount applications. It features a top round port configuration and operates within a frequency range of 100 Hz to 5 kHz. The component exhibits an impedance of 360 Ohms and delivers a sound pressure level of 110 dBA. This device is engineered for compact audio solutions requiring high efficiency in small form factors.
Feature Summary
- Balanced armature transducer technology for precise audio reproduction
- Top-mounted round port design for directional sound projection
- High sound pressure level output relative to physical size
Applications
- Mobile communication devices
- Wireless headsets and earpieces
- Portable medical audio equipment
Procurement Notes
Verify the specific datasheet version for mechanical dimensions and soldering profiles. Confirm RoHS compliance status with the manufacturer, as some listings indicate lead-free status while others may vary. Ensure the supplier provides genuine Knowles components to guarantee acoustic performance consistency and reliability standards.
Selection Notes
Select this component when a high-impedance (360 Ohms) balanced armature speaker is required for space-constrained designs. The 110 dBA sensitivity supports efficient drive requirements. Consider the top-port orientation for acoustic coupling needs. Evaluate thermal management capabilities if operating near maximum voltage limits.
Part Context
Knowles specializes in precision audio and sensing technologies. The CM series represents their line of miniature balanced armature speakers. These components are widely used in consumer electronics where miniaturization and acoustic fidelity are critical. The CM-28452-000 fits into this portfolio as a standard receiver solution.
Replacement Considerations
Check for direct substitutes from Knowles or other manufacturers offering identical 360 Ohm impedance and 110 dBA SPL. Verify footprint compatibility and terminal configuration. Acoustic performance may vary between brands even with matching electrical specifications.
