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:  -40℃ to +66℃

3.2 STORAGE TEMPERATURE RANGE:-40℃ to +66℃

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: 24×15×T3.8 [mm]

4.3 WEIGHT: Approx / grams

4.4 VOICE COIL DIAMETER:Internal diameterφ8.7mm

4.5 MAGNET SIZE:Rare earth permanent magnetφ8.0×1.0T

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 (at0.1M,0.1W)  at 1000,1200,1500,2000Hz average.

Measure Condition:sin swept measurement at 0.1W on axis at 0.1M.

With IEC Baffle plate.

           Measurement Circuit: shown in Fig.2

       5.2 RESONANCE FREQUENCY( Fo ):920±20%Hz at 1V.( 25℃,60%RH )

            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～10.0k 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):1.0W     

5.6MAX INPUT POWER (SHORT-TERM): 1.2W

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

5.7 TOTAL HARMONICDISTORTION: Less than10% at2KHz,0.1W

Measurement Circuit: Shown in Fig.2.

5.8 OPERATION: Must be normal at sine wave and program source1.0W.

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 at2.83Vrms sine wave from 920 to5.0KHz.     

Measurement Circuit: Shown in Fig.4.              

                                                                    产品尺寸图

                                                                         曲 线 图