BK-28507-000 Knowles Acoustics, BK-28507-000 Datasheet - Page 16

• Manufacturer Part Number: BK-28507-000
• Description: SPEAKER BALANCED BROADBAND
• Manufacturer: Knowles Acoustics
• Series: BKr
• Type: Magnetic, Balanced Armature, End Portr

Specifications of BK-28507-000

• Impedance: 13.3 Ohm
• Size / Dimension: 7.87mm L x 5.59mm W x 4.01mm H
• Termination: Solder Pads
• Shape: Rectangular
• Sound Pressure Level: 136 dB
• Termination Style: Wire
• Dimensions: 7.87 mm L x 5.59 mm W x 4.01 mm D
• Depth: 4.01 mm
• Length: 7.87 mm
• Width: 5.59 mm
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Rated: -
• Power - Max: -
• Frequency Range: -
• Sound Pressure Level: -
• Material - Cone: -
• Material - Magnet: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 423-1055; BK-28507; BK-8507

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SPECIALTY TRANSDUCERS – Speakers
FK SERIES
The world’s smallest balanced-armature speaker, the FK Series is designed
for applications where size is the most important design concern.
FH SERIES
The FH speaker represents an unprecedented combination of ultra-compact size and high SPL
output with efficiencies normally found only in much larger speakers. The FH speaker
line brings true high-gain, high-output performance to earphone designs.
Note: All performance curves are typical
M M o o d d e e l l
FK-23451-000
FK-23466-000
FK-26260-000
M M o o d d e e l l
FH-23375-000
FH-23377-000
FH-23821-000
FH-26553-000
– Balanced Armature Speaker 5.00 x 2.73 x 1.93 (mm)
– Balanced Armature Speaker 5.09 x 2.80 x 2.59 (mm)
Sensitivity @ 1kHz
Sensitivity @ 1kHz
(dB SPL)
(dB SPL)
95.5
95.5
100
100
100
100
96
•
•
•
•
•
•
•
114dB SPL maximum output
Two-terminal zero-bias configuration
Undamped, screen damped, and internally damped responses
Wide range of coil impedances
Undamped, screen damped, internally damped, and Ferrofluid
damped responses
Various port locations, coil impedances, damping options,
termination configurations, and frequency responses available
Maximum SPL output of 123dB at resonance peak, 109dB
at midband (500Hz)*
Port Location
Port Location
12S
12S
12S
12S
12S
12S
12S
www.knowles.com
Impedance @ 500Hz
Impedance @ 500Hz
(Ohms)
(Ohms)
450
450
180
335
685
174
90
Max SPL @ 500Hz
Max SPL @ 500Hz
™
(dB SPL)
(dB SPL)
104.5
104.5
104.5
108.5
108.5
108.5
108.5
120
115
110
105
100
95
90
85
80
100
120
115
110
105
100
Max SPL @ 1st Peak
Max SPL @ 1st Peak
95
90
85
80
100
(dB SPL)
(dB SPL)
2
118.5
118.5
115.5
123
123
123
123
2
3
3
4
4
5
6 7 8 9
5 6 7 8 9
FREQUENCY (Hz)
FREQUENCY (Hz)
100
1k
2
2
3
3
4
4
5
5 6 7 8 9
6 7 8 9
10000
10k