Knowles sub-miniature speaker designs are based on balanced armature technology, utilized in a variety of high performance audio and communication products.
Knowles balanced armature speakers are available in several sizes and efficiencies, which can be finely tuned to meet your specific performance requirements.
They can be designed to fit inside ear molds, attach to earpieces, or be sub-assembled by Knowles for premium consumer electronics accessories.
7.87mm x 5.59mm x 4.04mm (.250in x .170in x .119in)
- High sensitivity
- Responses include standard and broader band
- Low distortion
- Self-shielded for low magnetic radiation
- Wide range of port locations and impedances
- 2 and 3 terminal versions
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25.15mm x 25.40mm x 9.65mm (.990in x 1.000in x .380in)
- Excellent sound quality
- High speech intelligibility
- Suitable for PCB mounting
- Can function as a microphone or beeper
- Various impedances
- Face and edge port locations available
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9.47mm x 7.18mm x 4.10mm (.373in x .283in x .162in)
- 143dB SPL maximum output
- Undamped response
- Two and Three-terminal electrical connection
- Various port locations
- Wide range of coil impedances
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8.38mm x 16.64mm (.330in x .655in)
- Built-in static protection
- Lightweight, matt-black, plastic housing
- Ergonomically designed with rounded edge to fit the concha
- High-quality sound output
- Tailored bandwidth for superb speech intelligibility
- Rugged construction
- Various impedances
- Flexi-circuit or wire lead-out options
- Can be modified to function as a microphone
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- Dual elements with single sound port
- Increased output
- Reduced vibration
- Enable hi-fi designs
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7.59mm x 4.34mm x 3.73mm (.299in x .171in x .147in)
- High sensitivity
- Ferrofluid available for screenless damping and improved shock performance
- Low distortion
- Self-shielded for low magnetic radiation
- Wide range of impedances
- 2 and 3 terminal versions
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6.32mm x 4.31mm x 2.97mm (.249in x .170in x .117in)
- Compact size - 0.081cc
- Appreciable output power - 112dB nominal, 129dB maximum
- Two-terminal zero-bias and three-terminal center-tapped configurations
- Undamped, screen damped, internally damped, and FerrofluidTM damped responses with 2dB, 4dB, or 6dB peak amplitude
- Numerous port locations
- Wide range of coil impedances
- Available with FerrofluidTM technology for screenless damping and improved shock performance
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7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in)
- For all ranges of BTE applications
- 139dB SPL maximum output
- Two-terminal zero-bias and three-terminal center-tapped configurations
- Broad bandwidth for improved sound quality
- Undamped, screen damped and FerrofluidTM damped responses with 2dB, 4dB, or 6dB peak amplitude
- Numerous port locations
- Wide range of coil impedances
- Available with PantographTM, FerrofluidTM, and Vibration IsolationTM technologies
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5.19mm x 3.55mm x 3.00mm (.204in x .140in x .118in)
- 128dB SPL maximum output
- Two-terminal zero-bias and three-terminal center-tapped configurations
- Undamped, screen damped, internally damped, and FerrofluidTM damped responses with 2dB, 4dB, or 6dB peak amplitude
- Numerous port locations
- Wide range of coil impedances
- Available in Class-D amplified version as ES or FES receiver
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6.33mm x 4.31mm x 2.97mm (.249in x .170in x .117in)
- 125dB SPL maximum output
- Five power levels - 96dB, 100dB, 102dB, 106dB, and 108dB nominal SPL output at 1kHz
- Three-terminal electrical connection
- Undamped, screen damped, internally damped, and FerrofluidTM damped responses
- Numerous port locations
- Available in four-terminal clock sync version
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5.19mm x 3.55mm x 3.00mm (.204in x .140in x .118in)
- EH micro speaker, but with internal, highly-efficient, class D amplifier
- Lower current drain prolongs battery life
- Lower distortion
- Available in a range of SPL ratings
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5.17mm x 3.55mm x 3.00mm (.204in x .140in x .118in) with rounded corners.
- 127dB SPL maximum output
- Available in High-Output HC receiver version - even more MPO
- Two-terminal zero-bias and three-terminal center-tapped configurations
- Undamped, screen damped, internally damped, and FerrofluidTM damped responses with 2dB or 4dB peak amplitude
- Numerous port locations
- Wide range of coil impedances
- Available with FerrofluidTM technology offering screenless damping and improved shock performance
- Available in Class-D amplified version as FD and FFD receiver
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5.09mm x 2.80mm x 2.59mm (.200in x .111in x .102in)
- 124dB SPL maximum output
- Two-terminal zero-bias and three-terminal configurations
- Undamped, screen damped, internally damped, and FerrofluidTM damped responses with 2dB, 4dB, or 6dB peak amplitude
- Numerous port locations
- Wide range of coil impedances
- Available with FerrofluidTM technology offering screenless damping for superior shock performance and reduced receiver vibration
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5.00mm x 2.73mm x 1.93mm (.197in x .108in x .078in)
- 123dB SPL maximum output
- Two-terminal zero-bias configuration
- Undamped, screen damped, and internally damped responses
- Numerous port locations
- Wide range of coil impedances
- Wide bandwidth version available - ideal for patients with mild to moderate high-frequency hearing loss.
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5.17mm x 3.55mm x 3.00mm (.204in x .140in x .118in) with rounded corners.
- In-ear size receiver
- Improved low frequency headroom
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6.40 dia x 3.99mm (.252 dia x .157in)
- Round package
- Drop-in upgrade for moving coil dynamic speakers
- Designed for high volume production
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7.87mm x 4.09mm x 2.79mm (.310in x .161in x .110in)
- Ultra-thin
- Wideband output
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5.00mm x 2.73mm x 3.86mm (.197in x .108in x .152in)
- Dual elements with single sound port
- Extreme wideband capability
- Unique woofer/tweeter design
- Mechanical shock resistance
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