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SPECIFICATION
FOR DYNAMIC SPEAKER
06TOTAL PAGE
www.be-star.com
Preliminary Specification for The Acoustic
Characteritics of Dynamic Speaker
Customer
Date
Page
Approval：
22 Oct. 09
01 of 06
Model Name
Product No.Customer P/N
Issue No.
Issue Date
BLS2828-12-04H11 LF
124906
BS/TES01.1032A
09/10/22
RoHS
1.Description
2.Characteristics
3.Drawing
4.Reliability Test
5.Packing
6.History Change Record
Drawn by
Checked by
Approved by
Customer approved
BESTAR ELECTRONICS INDUSTRY CO.,LTD
No.199 HuangHe West Road.New district,ChangZhou,JiangSu Province,P.R.China
Tel: +86 519 88222567 Fax: +86 519 88222551
E-mail:wu@be-star.com http://www.be-star.com
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BLS2828-12-04H11 LF
1.Description
1.1 Acoustic component Performance Specification
1.2 The present document specifies performance requirements
for the acoustic characteristics of speaker
2. Characteristics
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2.1 Electrical and Mechanical Characteristics
No. Item Specification
1. Dimension 28X28X11(mm)
2. AC Impedance(at 1kHz) 4 ±15%Ω
3. Rated Input Power 2.0W
4. Maximum Input Power 2.5W
5. Resonance Frequency 500±20%Hz
6. Frequency Response F0～20KHz
7. Output SPL 83±3dB/0.1W /0.1m at 1.0KHz
8. Distortion ≤5%（at 1kHz,0.1W）
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9. Buzzes & Rattles must be normal at 2.83Vrms (sine wave)
10. Operating Temperature -20～+65°C
11. Storage Temperature -25～+75°C
D
and shall not be used in whole or in part without its written content
12. Weight ~11.8g
2.2 Test Method
D
Power Amplifier
This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.
C
C
10cm
0.1W(0.63Vrms)
B
Speaker
Mic
Audio
Analyser
B
Anechoic chamber
Date:
Drawn by:
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Rev.
09/10/22A
Date
6
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Drawn
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Note
Checked by:
Approved by:
www.be-star.com wu@be-star.com
09/10/22
张小红
王文邦
李红元
3 2
BLS2828-12-04H11 LF
Speaker
DRG NO: BS/TES01.1032A
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Page 3
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BLS2828-12-04H11 LF
H
2.3 Frequency Response Curve( only for reference)
A: Frequency Response Magn 0 dB re 20.00μPa/V 1/12Oct
110
4 3 2 1
H
G
G
100
90
F
F
80
Sound Pressure Level (dB)
70
E
E
60
100
500
1K
2K 5K 10K 20K200
Frequency (Hz)
3. Drawing
D
Unit:mm
D
and shall not be used in whole or in part without its written content
This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.
C
B
Date:
Drawn by:
A
A
Rev.
09/10/22
6 5
张小红
DrawnDate
Note
Checked by:
Approved by:
www.be-star.com wu@be-star.com
4 3
09/10/22
张小红
王文邦
李红元
BLS2828-12-04H11 LF
Speaker
DRG NO: BS/TES01.1032A
2 1
Page:3 of 6
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BLS2828-12-04H11 LF
4. Reliability Test
4.1 Load Test
Power 1.0W (sine wave)
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Duration 96hrs
4.2 High Temperature Test
Temperature +75±3℃
Relative Humidity 20%-50%RH
Duration 16hrs
4.3 Low Temperature Test
Temperature -25±3 ℃
Duration 16hrs
4.4 Damp Heat
Temperature 40±3℃
Relative Humidity 90%-95%RH
Duration 16hrs
4.5 Temperature Cycle Test
Cycle 4
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+75°C
25°C
1hrs 1hrs
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-25°C
1hrs
25°C
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4.6 Drop Test
and shall not be used in whole or in part without its written content
Height 100cm (in state of packing)
Times 10 (Drop onto hardwood board)
This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.
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Notice:
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1.All these tests above should be measured after leaving normal temperature
for 2hrs.
2.sensitivity difference at 1kHz shall be within ±3dB from initial value after test.
B
B
Date:
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09/10/22
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Checked by:
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Approved by:
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09/10/22
张小红
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李红元
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BLS2828-12-04H11 LF
Speaker
DRG NO: BS/TES01.1032A
2 1
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5. Packing
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600pcs 600pcs
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and shall not be used in whole or in part without its written content
This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.
C
Remark:
40 pcs per tray
B
Date:
Drawn by:
A
A
Rev.
09/10/22
Date Drawn
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Note
Checked by:
Approved by:
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09/10/22
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王文邦
李红元
3
15 trays for unit, 2 units per carton
Total 1200pcs per carton
Size: 41×33×27.5(cm)
BLS2828-12-04H11 LF
Speaker
DRG NO: BS/TES01.1032A
2 1
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6. History Change Record
45
3
12
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version
No.
G
F
E
A
Before After
Change Items
Date
09/10/22
Drawn
张小红
Approved
李红元
G
F
E
D
and shall not be used in whole or in part without its written content
This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.
C
B
Date:
Drawn by:
A
A
09/10/22
Rev.
6
张小红
DrawnDate
Checked by:
Note
5
Approved by:
www.be-star.com wu@be-star.com
4
09/10/22
张小红
王文邦
李红元
3
BLS2828-12-04H11 LF
Speaker
DRG NO: BS/TES01.1032A
2
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