Hearing instrument receivers

  • Advanced noise reducing options
  • Custom-crafted performance
  • Improved durability

Knowles' balanced armature technology platform uplifts the design and development of receivers for more advanced hearing aid solutions.

Precise, custom-crafted performance is facilitated by such proprietary design possibilities as Pantograph™ higher audio output, Ferrofluid™ damping, Wide Bandwidth for high-frequency hearing loss, D-Amp™ internal power management, and Vibration Isolation for superior gain-before-feedback.

Select a product category to view features, benefits, documents and performance details

Image Series Dimensions Features
BK series BK series 7.87mm x 5.59mm x 4.04mm (.310in x .220in x .158in)
  • 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
CI series CI series 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
DFK series DFK series 5.00mm x 2.73mm x 3.86mm (.197in x .108in x .152in)
  • 130dB SPL maximum output
  • Low Vibration
DTEC series DTEC series 7.87mm x 4.09mm x 5.23mm (.310in x .161in x .206in)
  • Dual elements with single sound port
  • Increased output
  • Reduced vibration
  • Enable hi-fi designs
EC/FEC series EC/FEC series 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
ED/FED series ED/FED series 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
EF/FEF series EF/FEF series 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
EH/FEH series EH/FEH series 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
EJ series EJ series 6.33mm x 4.32mm x 5.97mm (.249in x .170in x .235in)
  • 135dB SPL maximum output
  • Low Vibration
FC/FFC series FC/FFC series 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
FH/FFH series FH/FFH series 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
FJ series FJ series 5.08mm x 2.79mm x 5.18mm (.200in x .110in x .204in)
  • 129dB SPL maximum output
  • Low Vibration
FK series FK series 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.
GD series GD series 5.99mm x 3.10mm x 2.59mm (.256in x .122in x .102in)
  • High sensitivity
  • Low vibration
  • Low magnetic radiation
  • Wide range of port locations and impedances
GR series GR series 6.10mm x 3.20mm x 4.32mm (.240in x .126in x .170in)
  • High sensitivity
  • Low vibration
  • Low magnetic radiation
  • Wide range of port locations and impedances
HC/FHC series HC/FHC series 5.17mm x 3.55mm x 3.00mm (.204in x .140in x .118in) with rounded corners.
  • In-ear size receiver
  • Improved low frequency headroom
RAB series RAB series 5.28mm x 2.96mm x 2.58mm (.208in x .117in x .101in)
  • Popular form factor
  • Excellent efficiency for its size
  • Low magnetic radiation
  • Ideal for small hearing aids including RIC
  • Also for Bluetooth headsets & communications earpieces
TEC series TEC series 7.87mm x 4.09mm x 2.79mm (.310in x .161in x .110in)
  • Ultra-thin
  • Wideband output
TWFK series TWFK series 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