扬声器

1TypeDynamic speaker2DimensionExternal diameter 30 mm3Rated Input Power0.5W4Impedance8 ohm ± 15% at 1500Hz5Resonance Frequency (Fo)500 Hz ± 20% at Fo, 1V6Sensitivity (S.P.L.)79dB(W/m) ± 3 dB at AVE 0.8K,1.0K,1.2K,1.5K(Hz).
95 dB(0.5W/0.1m) ± 3 Db7Frequency RangeFo – 5KHz8DistortionLess than 10 % at 1500Hz 0.5W9Max. Input PowerMust be normal at
1.0W white noise for 1 minute.10Voice CoilDiameter 10.5 mm11MagnetRare earth permanent (Ferrite) magnet Φ9.5 X
1.5 mm12Weight5.8g ± 0.3g13AppearanceShould not exist any obstacle to be harmful to normal operation; damages, cracks, rusts and distortions, etc.14Operation TestMust be normal at program source –0.5W15Buzz, Rattle, etc.Should not be audible at
2.0V sine Wave between Fo to 20KHz16PolarityWhen positive voltage is applied to the terminal marked ( ), diaphragm should move to the front.17Terminal StrengthCapable of withstand 1kg load for 30 seconds without resulting in any damage or rejection.18Load Test0.5 W white noise is applied for 96 hours and satisfy the test listed on item 05,06,13,1519High Temp. TestKeep 96 hours at 70℃±3℃ and leave 3 hours in normal temperature and then check20Low Temp. TestKeep 96 hours at -20℃±3℃ and leave 3 hours in normal temperature and then check21Humidity TestKeep 96 hours at 60℃±3℃ relative humidity 95% and leave 3 hours in normal temperature and then checked.22Drop TestDrop the speakers contained in normal box onto the board 20mm thick 10 times from the height of 0.75m and then should satisfy the test listed on item 13 and 15