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Knowles Speakers & Transducers

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Brand = Knowles

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Part #

Speakers & Transducers 1.37DIA X 1.57MM SCREEN 1500 RES

BF-3039-000
Knowles
1: £2.01
78In Stock

Mfr. Part No.
BF-3039-000

Mouser Part No
721-BF-3039-000

Knowles

Speakers & Transducers 1.37DIA X 1.57MM SCREEN 1500 RES

Datasheet

78In Stock

£2.01

£1.58

£1.44

£1.41

View

Min.: 1
Mult.: 1

Dampers

Acoustic

1.5 kOhms

Round

1.37 mm

1.57 mm

Speakers & Transducers Balanced Armature Speaker

SWFK-31736-000
Knowles
1: £46.63
67In Stock

Mfr. Part No.
SWFK-31736-000

Mouser Part No
721-SWFK31736000

Knowles

Speakers & Transducers Balanced Armature Speaker

Datasheet

67In Stock

£46.63

£35.50

£32.08

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

7.6 kHz

114 dBA

7 Ohms

Rectangular

Solder Pad

- 17 C

+ 63 C

3.86 mm

2.73 mm

5.03 mm

Speakers & Transducers RECEIVER

WBFK-33649-000
Knowles
1: £23.58
83In Stock

Mfr. Part No.
WBFK-33649-000

Mouser Part No
721-WBFK-33649-000

Knowles

Speakers & Transducers RECEIVER

83In Stock

£23.58

£17.77

£16.00

£14.80

£14.00

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

Rectangular

Solder Pad

- 17 C

+ 63 C

5 mm

2.73 mm

1.98 mm

Speakers & Transducers Plug 2.08 dia. 330 Res, Grey

BF-1999-000
Knowles
1: £1.64
1,125In Stock

Mfr. Part No.
BF-1999-000

Mouser Part No
721-BF-1999-000

Knowles

Speakers & Transducers Plug 2.08 dia. 330 Res, Grey

Datasheet

1,125In Stock

£1.64

£1.29

£1.17

£1.10

View

Min.: 1
Mult.: 1

Dampers

Acoustic

330 Ohms

Round

2.08 mm

2.44 mm

Speakers & Transducers Balanced Armature Receiver

RAB-32037-000
Knowles
1: £13.88
100In Stock

Mfr. Part No.
RAB-32037-000

Mouser Part No
721-RAB-32037-000

Knowles

Speakers & Transducers Balanced Armature Receiver

Learn More

Datasheet

100In Stock

£13.88

£10.76

£9.73

£9.10

£8.50

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

6.2 kHz

101 dBA

124 Ohms

Rectangular

Solder Pad

0 C

+ 63 C

5.28 mm

2.96 mm

2.58 mm

Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 1S PORT

EF-26329-000
Knowles
1: £24.11
22In Stock

Mfr. Part No.
EF-26329-000

Mouser Part No
721-EF-26329-000

Knowles

Speakers & Transducers 7.87 X 5.59 X 4.01MM 126 SENS, 1S PORT

Datasheet

22In Stock

£24.11

£18.23

View

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

1 kHz

126 dBA

150 Ohms

Rectangular

Solder Pad

7.87 mm

5.59 mm

4.06 mm

Speakers & Transducers WIDE BANDWIDTH, WARM BASS, HIGH OUTPUT

HE-31751-000
Knowles
1: £38.16
23In Stock

Mfr. Part No.
HE-31751-000

Mouser Part No
721-HE-31751-000

Knowles

Speakers & Transducers WIDE BANDWIDTH, WARM BASS, HIGH OUTPUT

Datasheet

23In Stock

£38.16

£30.36

View

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

10 kHz

132 dBA

118.1 Ohms

Rectangular

Solder Pad

0 C

+ 63 C

9.47 mm

7.18 mm

7.26 mm

Speakers & Transducers Balanced Armature Speaker

FC-30814-P127
Knowles
1: £30.37
15In Stock

Mfr. Part No.
FC-30814-P127

Mouser Part No
721-FC30814P127

Knowles

Speakers & Transducers Balanced Armature Speaker

Datasheet

15In Stock

£30.37

£22.95

View

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

106.5 dBA

51.8 Ohms

Rectangular

Wire Leads

5.17 mm

3.53 mm

3 mm

Speakers & Transducers RECEIVER ASSEMBLY

RDU-35000-000
Knowles
1: £52.79
128In Stock

Mfr. Part No.
RDU-35000-000

Mouser Part No
721-RDU-35000-000

Knowles

Speakers & Transducers RECEIVER ASSEMBLY

Datasheet

128In Stock

£52.79

£40.18

£36.33

Min.: 1
Mult.: 1

Earphones

Balanced Armature

127 dBA

7 Ohms

Rectangular

Speakers & Transducers Balanced Armature Speaker

CI-22955-000
Knowles
1: £27.27
987In Stock

Mfr. Part No.
CI-22955-000

Mouser Part No
721-CI-22955-000

Knowles

Speakers & Transducers Balanced Armature Speaker

Datasheet

987In Stock

£27.27

£20.62

£18.57

£17.54

View

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

5.5 kHz

133 dBA

80 Ohms

Rectangular

Solder Pad

- 17 C

+ 63 C

9.5 mm

7.2 mm

4.1 mm

Speakers & Transducers RECEIVER ASSEMBLY

RAU-34832-B148
Knowles
1: £32.97
68In Stock

Mfr. Part No.
RAU-34832-B148

Mouser Part No
721-RAU-34832-B148

Knowles

Speakers & Transducers RECEIVER ASSEMBLY

Datasheet

68In Stock

£32.97

£26.22

£23.99

£23.34

Min.: 1
Mult.: 1

Earphones

Balanced Armature

122 dBA

14 Ohms

Rectangular

Speakers & Transducers Plug 2.08 dia. 680 Res, White

BF-1859-000
Knowles
1: £1.64
2,084In Stock

Mfr. Part No.
BF-1859-000

Mouser Part No
721-BF-1859-000

Knowles

Speakers & Transducers Plug 2.08 dia. 680 Res, White

Datasheet

2,084In Stock

£1.64

£1.29

£1.18

£1.10

View

Min.: 1
Mult.: 1

Dampers

Acoustic

680 Ohms

Round

2.08 mm

2.44 mm

Speakers & Transducers Plug 2.08 dia. 3300 Res, Orange

BF-1922-000
Knowles
1: £1.67
2,535In Stock

Mfr. Part No.
BF-1922-000

Mouser Part No
721-BF-1922-000

Knowles

Speakers & Transducers Plug 2.08 dia. 3300 Res, Orange

Datasheet

2,535In Stock

£1.67

£1.21

£1.08

£0.995

View

Min.: 1
Mult.: 1

Dampers

Acoustic

3.3 kOhms

Round

2.08 mm

2.44 mm

Speakers & Transducers 1.12DIA X 1.410MM SCREEN 680 RES

BF-1988-000
Knowles
1: £1.56
2,304In Stock

Mfr. Part No.
BF-1988-000

Mouser Part No
721-BF-1988-000

Knowles

Speakers & Transducers 1.12DIA X 1.410MM SCREEN 680 RES

Datasheet

2,304In Stock

£1.56

£1.23

£1.12

£1.05

View

Min.: 1
Mult.: 1

Dampers

Acoustic

680 Ohms

Round

1.12 mm

1.41 mm

Speakers & Transducers Balanced Armature Speaker

BK-28507-000
Knowles
1: £21.25
400In Stock

Mfr. Part No.
BK-28507-000

Mouser Part No
721-BK-28507-000

Knowles

Speakers & Transducers Balanced Armature Speaker

400In Stock

£21.25

£16.87

£15.42

£14.42

View

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

6 kHz

126 dBA

13.3 Ohms

Rectangular

Solder Pad

- 17 C

+ 63 C

7.87 mm

5.59 mm

4.01 mm

Speakers & Transducers Balanced Armature Speaker

FK-23451-000
Knowles
1: £34.43
42In Stock

Mfr. Part No.
FK-23451-000

Mouser Part No
721-FK-23451-000

Knowles

Speakers & Transducers Balanced Armature Speaker

Datasheet

42In Stock

£34.43

£27.38

£25.06

£24.49

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

1 kHz

107 dBA

630 Ohms

Rectangular

Solder Pad

5 mm

2.73 mm

1.98 mm

Speakers & Transducers Balanced Armature Receiver,level sound

RAB-32063-000
Knowles
1: £17.32
190In Stock

Mfr. Part No.
RAB-32063-000

Mouser Part No
721-RAB-32063-000

Knowles

Speakers & Transducers Balanced Armature Receiver,level sound

Learn More

Datasheet

190In Stock

£17.32

£13.01

£11.69

£10.81

View

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

10.8 kHz

116 dBA

41 Ohms

Rectangular

Solder Pad

0 C

+ 63 C

5.15 mm

2.96 mm

2.6 mm

Speakers & Transducers Balanced Armature Receiver

RAB-32066-000
Knowles
1: £16.51
713In Stock

Mfr. Part No.
RAB-32066-000

Mouser Part No
721-RAB-32066-000

Knowles

Speakers & Transducers Balanced Armature Receiver

Learn More

Datasheet

713In Stock

£16.51

£12.44

£11.19

£10.35

View

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

6.1 kHz

101.5 dBA

135 Ohms

Rectangular

Solder Pad

0 C

+ 63 C

5.3 mm

3.28 mm

2.73 mm

Speakers & Transducers dual balanced armature receiver

TWFK-30017-000
Knowles
1: £42.94
107In Stock
100Expected 03/04/2026

Mfr. Part No.
TWFK-30017-000

Mouser Part No
721-TWFK-30017-000

Knowles

Speakers & Transducers dual balanced armature receiver

Datasheet

107In Stock

100Expected 03/04/2026

£42.94

£34.19

£31.33

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

6.5 kHz

117 dBA

43 Ohms

Rectangular

Solder Pad

0 C

+ 63 C

5 mm

2.73 mm

4.36 mm

Speakers & Transducers Wideband Balanced Armature Speaker

WBFK-30095-000
Knowles
1: £17.74
110In Stock

Mfr. Part No.
WBFK-30095-000

Mouser Part No
721-WBFK-30095-000

Knowles

Speakers & Transducers Wideband Balanced Armature Speaker

Datasheet

110In Stock

£17.74

£14.08

£14.00

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

7.4 kHz

91 dBA

14.5 Ohms

Rectangular

Solder Pad

- 17 C

+ 63 C

5 mm

2.73 mm

1.98 mm

Speakers & Transducers RECEIVER

RDI-34006-000
Knowles
1: £35.66
67In Stock

Mfr. Part No.
RDI-34006-000

Mouser Part No
721-RDI-34006-000

Knowles

Speakers & Transducers RECEIVER

Datasheet

67In Stock

£35.66

£28.36

£27.38

£26.12

£25.47

Min.: 1
Mult.: 1

Earphones

Balanced Armature

141 dBA

25 Ohms

Rectangular

Speakers & Transducers RECEIVER ASSEMBLY

RLQ-34240-000
Knowles
1: £37.92
197In Stock

Mfr. Part No.
RLQ-34240-000

Mouser Part No
721-RLQ-34240-000

Knowles

Speakers & Transducers RECEIVER ASSEMBLY

Datasheet

197In Stock

£37.92

£30.16

£27.60

£27.27

Min.: 1
Mult.: 1

Earphones

Balanced Armature

126 dBA

57 Ohms

Rectangular

Speakers & Transducers PREMUIM BANDWIDTH WARM BASS, HIGH OUTP

GK-31732-000
Knowles
1: £50.66
63In Stock
100Expected 27/03/2026

Mfr. Part No.
GK-31732-000

Mouser Part No
721-GK-31732-000

Knowles

Speakers & Transducers PREMUIM BANDWIDTH WARM BASS, HIGH OUTP

Datasheet

63In Stock

100Expected 27/03/2026

£50.66

£42.72

£38.64

Min.: 1
Mult.: 1

Receivers

Balanced Armature

Panel Mount

1 kHz

131 dBA

23 Ohms

Rectangular

Solder Pad

0 C

+ 63 C

9.47 mm

7.18 mm

6.9 mm

Speakers & Transducers Plug 2.08 dia. 1500 Res, Green

BF-1861-000
Knowles
1: £1.81
238In Stock
300Expected 29/05/2026

Mfr. Part No.
BF-1861-000

Mouser Part No
721-BF-1861-000

Knowles

Speakers & Transducers Plug 2.08 dia. 1500 Res, Green

Datasheet

238In Stock

300Expected 29/05/2026

£1.81

£1.37

£1.23

£1.14

View

Min.: 1
Mult.: 1

Dampers

Acoustic

1.5 kOhms

Round

2.08 mm

2.44 mm

Speakers & Transducers Plug 2.08 dia. 2200 Res, Red

BF-1921-000
Knowles
1: £1.81
230In Stock
4,000On Order

Mfr. Part No.
BF-1921-000

Mouser Part No
721-BF-1921-000

Knowles

Speakers & Transducers Plug 2.08 dia. 2200 Res, Red

Datasheet

230In Stock

4,000On Order

£1.81

£1.37

£1.23

£1.20

View

Min.: 1
Mult.: 1

Dampers

Acoustic

2.2 kOhms

Round

2.08 mm

2.44 mm

Knowles Speakers & Transducers

Customer Service Office

Company

Resources

Support

70 Hz to 9.9 kHz
470 Hz
500 Hz
800 Hz
1 kHz
3.4 kHz
3.8 kHz
4 kHz
4.324 kHz
4.4 kHz
4.5 kHz
5 kHz
5.2 kHz
5.3 kHz
5.4 kHz
5.5 kHz
5.6 kHz
5.8 kHz
6 kHz
6.1 kHz

91 dBA
95 dBA
96 dBA
100 dBA
101 dBA
101.5 dBA
102.5 dBA
104 dBA
105.5 dBA
106 dBA
106.5 dBA
107 dBA
108 dBA
111.5 dBA
113.5 dBA
114 dBA
115 dBA
116 dBA
117 dBA
118 dBA

7 Ohms
7.1 Ohms
10.2 Ohms
13.3 Ohms
14 Ohms
14.5 Ohms
15.2 Ohms
17 Ohms
22 Ohms
23 Ohms
24.4 Ohms
25 Ohms
28 Ohms
28.125 Ohms
30 Ohms
31.5 Ohms
37 Ohms
40.5 Ohms
41 Ohms
43 Ohms

1.41 mm
1.57 mm
1.65 mm
2.44 mm
3.86 mm
5 mm
5.09 mm
5.15 mm
5.16 mm
5.17 mm
5.18 mm
5.19 mm
5.28 mm
5.3 mm
5.59 mm
6.3 mm
6.32 mm
7.87 mm
7.9 mm
9.47 mm

1.93 mm
1.98 mm
2.58 mm
2.59 mm
2.6 mm
2.73 mm
2.97 mm
3 mm
3.02 mm
3.8 mm
4 mm
4.01 mm
4.06 mm
4.1 mm
4.19 mm
4.36 mm
5.02 mm
5.03 mm
5.59 mm
6.3 mm