FHDDMT87A-Changzhou FHD electronics Co.,Ltd

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FHDDMT87A

Parts shall be measured under one condition (temperature: 5~35 ℃, humidity: 45% ~ 85% R.H., atmospheric pressure: 860 ~ 1060hPa), unless standard conditions (temperature: 25±3 ℃, humidity: 60±10%R.H. atmospheric pressure: 860 ~ 1060hPa) are adjusted.

Category： Multimedia speakers

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Keywords: buzzer | horn | materialized film

Product Description

1.SPECIFICATION
Speaker

1	Dimension	8787 H28
2	Impedance	8±15%Ω at 1KHz,1.0V
3	Rated Input Power	2W
4	Max Input Power	4W
5	Lowest Resonance Frequency	250Hz 20%
6	Audible Noise	Must be free audible noise (buzzes and rattles)(Fo ~ 7KHz frequency range ,input level up to 4V)
7	Sound Pressure Level	85±3 dB @ 0.4,0.5,0.6,0.8, 1.2KHz @ 1W/1.0m
8	Magnet	φ 40 * φ 19*8
9	Operating Temperature	-20 ℃ ~ +60 ℃
10	Store Temperature	-30 ℃ ~ +70 ℃

2.Dimensions * Unit: mm

Tolerance: ± 0.5mm Except Specified

3.Reliability Test Reliability Test

3.1 Load Test Continuous Load Test
Power Power: 2W
Duration Test Duration: 48hrs
3.2 High Temperature Test Heat Resistance Test
Temperature Temperature: +55±2 ℃
Relative Humidity:20%-25% RH
Duration Test Duration: 16hrs
3.3 Damp Heat Humidity Test
Temperature Temperature: 40±2 ℃
Relative Humidity Humidity: 90%-95% RH
Duration Test Duration: 48hrs

All these tests above should be measured after leaving normal temperature for 1hrs.
Sensitivity difference at 1kHz shall be within ± 3dB from initial value after test.
After the above test is completed, it must be placed at room temperature for 1 hour before testing.
test sound pressure level change requirements 1kHz must be within ± 3dB.

4.Electrical And Acoustical Measuring Condition