产品详情介绍

1. SCOPE 

 This specification cover our product of mylar speaker unit for use

inDVD，telephone,interphone,alarm system and calling system.

  2. OUTLINE &TABLE OFMETERIALS

     Shown in Fig.1

  3. GENERAL REQUIREMENTS

3.1 OPERATING TEMPERATURE RANGE:  -20℃ to +60℃

3.2 STORAGE TEMPERATURE RANGE:-20℃ to +60℃

3.3SOLDERING TEMPERATURE:380℃ ±20℃

3.4 JUDGEMENT CONDITIONS:

        Temperature:                20±2℃

        Relative Humidity:          60%～70%(RH)

    Air Pressure:               860～1060hPa

  4.MECHANICALCHARACTERISTIC

4.1 TYPE: dynamic speaker

4.2 DIMENSION:φ28×T 5.5±0.3 mm

4.3 WEIGHT: Approx /±0.1 grams

4.4 VOICE COIL DIAMETER: Internal diameterφ13.28 mm

4.5 MAGNET SIZE: Rare earth permanent magnetφ12.5×1.4T

4.6 MAGNET WEIGHT:/±0.05 [g]

4.7 APPEARANCE: Should not exist any obstacle be harmful to normal operation:

               Damages, cracks, rusts and distortions,etc.

4.8 TERMINAL STRENGTH: Capable of with stand a (0.5Kg) load for 15 sec.

                      Without resulting in any damage or rejection.     

5.ELECTRICAL AND ACOUSTICAL CHARACTERISTIC

5.1 SOUND PRESSURE LEVEL( S.P.L ) 

        Sound pressure level shall be indicated by the mean value of those measured

  at the specified frequency range.   

  90±3dB at 800、1000、1200、1500Hz in average.

Measure Condition:sin swept measurement at0.1W on axis at0.1M.

With IEC Baffle plate.

           Measurement Circuit: shown in Fig.2

       5.2 RESONANCE FREQUENCY( Fo ): 700±20%Hz at 1V.( No Baffle )

            Measurement Circuit: shown in Fig.2

5.3 RATED IMPEDANCE:8 ±15% ohm(at 1KHz,1 V)

 Measure Condition: the impedance response is measured with Mylar speaker.

Measurement Circuit: shown in Fig.2

5.4 FREQUENCY RANGE: Fo～5.5k Hz (Deviation 10 dB from average S.P.L.)

Frequency Response Curve: Shown in Fig.3. Whit IEC Baffle plate.

Frequency Response Measurement Circuit: Shown in Fig.2.   

5.5RATED INPUT POWER (CONTINUUM): 1.5W     

5.6MAX INPUT POWER (SHORT-TERM):1.8W

  Testing will be done using IEC filter with white noise source for 1 minute with no degradation in performance.

5.7 TOTAL HARMONICDISTORTION: Less than 5% at 1KHz,0.1W

Measurement Circuit: Shown in Fig.2.

5.8 OPERATION: Must be normal at sine wave and program source1.5W.

5.9 POLARITY: When a positive DC current is applied to the terminal marked (+),

               Diaphragm shall move forward.    

5.10 PURE SOUND DETECTION:Buzz、Rattle、etc Should not be audible at 3.46 V RMS sine wave from 700 to 5.0KHz.     

Measurement Circuit: Shown in Fig.4.              

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