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FHDDMT78A

常州富鴻達(dá)電子有限公司成立于2010年,生產(chǎn)蜂鳴器,喇叭,報(bào)警器,咪頭等電聲器件,是一家集研發(fā)、生產(chǎn)、銷售一體的企業(yè)。
產(chǎn)品詳情

1.SPECIFICATION
Speaker

1

Dimension

φ 77 * H 30mm

2

Impedance

8Ohm ± 20% at 1KHz

3

Rated Input Power

2.0W

4

Max Input Power

3.0W

5

Lowest Resonance Frequency

250 20% Hz @ 1V. (Without Baffler)

6

Audible Noise

input power shall be set at rated noise power(2.0W). Using an audio oscillator sweep from F0 to 20KHZ in free air. There shall be no buzzes,rattles,nor spurious noises.

Sound Pressure Level

113 3dB SPL(0.1m,1.0W) at1.0,1.2,1.5,2.0KHz (0dB SPL = 20μPa)

8

Distortion

Less exceeded ≤ 10% at 1.0KHz

9

Operating Temperature

-20 ℃ to +50 ℃

10

Store Temperature

-30 ℃ to +60 ℃

2.Dimensions

3.Reliability Test Reliability Test

3.1

High Temperature Test


High Temperature: +60 ℃ 5 ℃

Duration: 48 hours

3.2

Low Temperature Test


Low Temperature: -30 ℃ 5 ℃

Duration: 48 hours

3.3

Humidity Test


Temperature: +40 ℃ 5 ℃
Relative humidity: 90% ~ 95% RH

Duration: 48 hours

3.4

Vibration Test


Vibration: 10Hz ~ 55Hz
Amplitude: 1.52mm or acceleration : 50m/s2

Duration : 2h per axis = 10 cycles ; 3 axis

3.5

Temperature Cycle Test


Temperature: -30 ℃ +60 ℃
Duration : 1 hours 1 hours

Cycle: 5 Cycle

3.6


Drop Test

(under the unit)


Height: 1.0m

Cycle: 5 Cycles

3.7

Load Test


Noise: White noise
Power: 2.0W

Duration: 48 hours and satisfy the test listed on item 05,08,14.


The test shall be carried out on the parts that passed 12hours in temperature 20℃.

The sensitivity difference from the initial value shall be within ±3dB.

4.Electrical And Acoustical Measuring Condition

5.Frequency Response

Keywords: FHDDMT78A

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電話:+86-519-83822009
電話:+86-13813568186
傳真:+86-519-88739926
地址:江蘇省常州市天寧區(qū)鄭陸鎮(zhèn)

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