BK-28507-000 Knowles Acoustics, BK-28507-000 Datasheet - Page 23

• 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

MR SERIES
The MR Series Assemblies consist of a speaker element attached to a waterproof
bellows assembly. They may be panel mounted, and are suitable for outdoor use
or repeated submersion.
CB SERIES
The CB Series Transceiver offers high electro-acoustic efficiency to conserve power in
push-to-talk radio handsets and other battery operated equipment. The CB is available
with mounting pins to facilitate assembly to a PC board. Model CB-23817-000 is designed
to survive submersion in water.
M M o o d d e e l l
MR-23333-000
M M o o d d e e l l
CB-22849-000
CB-22850-000
CB-23817-000
– Balanced Armature Speaker 25.15 x 25.15 x 9.65 (mm)
– Waterproof Speaker 22.12 DIA x 9.3 (mm)
Sensitivity @ 1kHz
Sensitivity @ 1kHz
(dB SPL)
(dB SPL)
100
73
73
83
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Highly waterproof – no loss of performance after
immersion in 15m water
Corrosion resistant
Withstands explosive decompression
Design proven in rugged environments
Leads attached
High resistance to mechanical shock
Acoustically transparent bellows
Resists effects of mud, sand, and salt encrustation
Excellent sound quality
High speech intelligibility, stability, and reliability
Suitable for PCB mounting
Can function as a microphone or beeper
Various impedances
Face and edge port locations available
Port Location
Port Location
Edge
Edge
Edge
Face
www.knowles.com
Impedance @ 500Hz
Impedance @ 500Hz
SPECIALTY TRANSDUCERS – Speakers
(Ohms)
(Ohms)
21
24
48
48
Max SPL @ 500Hz
Max SPL @ 500Hz
(dB SPL)
(dB SPL)
80.5
80.5
110
95
125
115
105
95
85
100
90
80
70
60
50
100
Max SPL @ 1st Peak
Max SPL @ 1st Peak
2
(dB SPL)
(dB SPL)
2
96.5
96.5
129
107
3
3
4
4
5
6 7 8 9
5
6 7 8 9
FREQUENCY (Hz)
Note: All performance curves are typical
FREQUENCY (Hz)
1k
1k
2
2
3
3
4
4
5
5
6 7 8 9
6 7 8 9
10k
10k
23