EF/FEF series

The staple receiver for modern BTE hearing instruments, the EF series represents a precise balance of output power and compact size. Its length-width-height ratio provides an optimum fit that helps maximize BTE space and layout considerations while still providing superior acoustic output. A full range of Knowles' PantographTM, FerrofluidTM, and Vibration IsolationTM technologies help maximize the EF series use for any BTE instrument design. The FEF receiver brings the advantages of Ferrofluid damping, including reduced receiver vibration and improved shock survivability. These advantages are added to the EF receiver's precise balance of power and compact size. A full range of Knowles' PantographTM and Vibration IsolationTM technologies help maximize the FEF series optimum fit and superior acoustic output.

Features

EF/FEF series
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Product Families Model ID Dimensions Sensitivity Port Loc. Resp. (DCR) Imp @ 1kHz Imp @ 500 Hz Ferrofluid MPO 500 MPO Pk Vibration BRV (Damping) Downloads
EF/FEF EF-21763-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 125 12S 195 1275 501 No 121 139 Standard Undamped
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(200.71 kB)

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(1.37 MB)

EF/FEF EF-21933-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 125 12S 195 1275 501 No 121 139 Standard Undamped
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(204.48 kB)

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(1.49 MB)

EF/FEF EF-21935-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 125 12S 48.5 327 128 No 121 139 Standard Undamped
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(207.07 kB)

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(1.49 MB)

EF/FEF EF-21937-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12S 92.5 641 250 No 121 139 Standard Undamped
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(206.78 kB)

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(1.49 MB)

EF/FEF EF-21942-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 125 12S 92.5 641 250 No 121 139 Standard Undamped
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(203.09 kB)

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(1.37 MB)

EF/FEF EF-21943-033 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 125 12S 92.5 630 240 No 121 139 Standard Undamped
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(209.37 kB)

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(1.49 MB)

EF/FEF EF-21958-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 124 12C 195 1331 501 No 121 139 Standard Undamped
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(173.79 kB)

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(1.54 MB)

EF/FEF EF-23094-XXX 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 125 12S 92.5 641 250 No 121 139 Standard Undamped
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(1.49 MB)

EF/FEF EF-23168-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12S 46.5 160 62 No 121 139 Standard Undamped
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(200.66 kB)

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(1.37 MB)

EF/FEF EF-23187-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 2S 530 3560 1400 No 121 139 Standard Undamped
EF/FEF EF-26161-116 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 2S 75 542 212 No 121 139 Standard Undamped
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(138.70 kB)

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(1.39 MB)

EF/FEF EF-26274-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12C 10 76 30 No 121 139 Standard Undamped
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(201.51 kB)

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(1.41 MB)

EF/FEF EF-26329-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 1S 35 150 64 No 121 139 Standard Undamped
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(203.39 kB)

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(1.37 MB)

EF/FEF EF-26348-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 118 2S 39.1 155 69 No 121 139 Standard Undamped
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(133.53 kB)

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(1.39 MB)

EF/FEF EF-26363-116 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 2S 28 136 57 No 121 139 Standard Undamped
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(138.83 kB)

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(1.39 MB)

EF/FEF EF-26369-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 113 12S 46.5 30000 30000 No 121 139 Standard Undamped
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(149.00 kB)

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(3.26 MB)

EF/FEF EF-26418-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 114.5 12N 50 377 140 No 121 139 Standard Undamped
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(168.63 kB)

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(1.27 MB)

EF/FEF EF-26419-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 114.5 12N 50 377 140 No 121 139 Standard Undamped
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(168.41 kB)

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(1.27 MB)

EF/FEF EF-26426-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 122 1S 46.5 160 62 No 121 139 Standard Undamped
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(200.82 kB)

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(1.37 MB)

EF/FEF EF-26430-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 124 12S 165 964 438 No 121 139 Standard Undamped
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(184.65 kB)

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(1.49 MB)

EF/FEF EF-26494-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 1S 195 1275 501 No 121 139 Standard Undamped
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(202.89 kB)

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(1.37 MB)

EF/FEF EF-26634-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 1S 92.5 675 265 No 121 139 Standard Undamped
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(203.19 kB)

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(1.37 MB)

EF/FEF EF-26635-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 2S 21 147 57.5 No 121 139 Standard Undamped
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(134.88 kB)

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(1.39 MB)

EF/FEF EF-26636-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 2S 15 101 42 No 121 139 Standard Undamped
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(147.30 kB)

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(1.39 MB)

EF/FEF EF-26665-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126.5 1S 105 636 252 No 121 139 Standard Undamped
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(204.20 kB)

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(1.37 MB)

EF/FEF EF-26692-116 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 2S 290 555 300 No 121 139 Standard Undamped
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(139.15 kB)

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(1.39 MB)

EF/FEF EF-26708-017 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 124 12S 25 175 70 No 121 139 Standard Undamped
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(130.81 kB)

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(2.56 MB)

EF/FEF EF-26714-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12S 35 150 64 No 121 139 Standard Undamped
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(202.53 kB)

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(1.37 MB)

EF/FEF EF-27351-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12S 21 140 57 No 121 139 Standard Undamped
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(203.16 kB)

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(1.37 MB)

EF/FEF EF-27428-116 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 2S 92.5 641 250 No 121 139 Standard Undamped
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(139.45 kB)

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(1.47 MB)

EF/FEF EF-27505-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12S 105 636 252 No 121 139 Standard Undamped
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(203.66 kB)

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(1.37 MB)

EF/FEF EF-27534-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12S 15 110 43 No 121 139 Standard Undamped
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(202.61 kB)

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(1.37 MB)

EF/FEF EF-27715-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 11S 48.5 327 128 No 121 139 Standard Undamped
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(184.77 kB)

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(1.50 MB)

EF/FEF EF-27985-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12S 48.5 345 135 No 121 139 Standard Undamped
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(203.60 kB)

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(1.37 MB)

EF/FEF EF-28378-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12S 195 1275 501 No 121 139 Standard Undamped
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(207.34 kB)

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(1.49 MB)

EF/FEF EF-29586-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12S 20 135 53 No 121 139 Standard Undamped
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(190.09 kB)

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(1.50 MB)

EF/FEF EF-29615-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 1S 48.5 345 135 No 121 139 Standard Undamped
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(206.76 kB)

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(1.50 MB)

EF/FEF EF-29734-033 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12C 48.5 342 128 No 121 139 Standard Undamped
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(208.10 kB)

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(1.54 MB)

EF/FEF EF-29802-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 126 12S 530 3382 1332 No 121 139 Standard Undamped
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(207.67 kB)

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(1.49 MB)

EF/FEF EF-30037-000 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 119 1S 15 98 40 No 121 139 Standard Undamped
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(191.19 kB)

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(1.37 MB)

EF/FEF FEF-26348-I02 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 116 2S 39.1 115 73 Yes 121 DDL Standard Ferrofluid
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(202.13 kB)

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(1.39 MB)

EF/FEF FEF-26356-I04 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 116 12S 39.1 135 73 Yes 121 DDL Standard Ferrofluid
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(202.93 kB)

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(1.37 MB)

EF/FEF FEF-26790-I02 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 116 2S 18 88 50 Yes 121 DDL Standard Ferrofluid
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(203.86 kB)

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(1.39 MB)

EF/FEF FEF-27351-P16 7.87mm x 5.59mm x 4.01mm (.310in x .220in x .158in) 116 12S 20 113 56 Yes 121 DDL Standard Ferrofluid
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(279.43 kB)

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(1.55 MB)