01

Type

Dynamic speaker

02

Dimension

External diameter 13*4.5mm

03

  Rated Input Power

0.3W

04

Impedance

8 ohm ± 15% at 1.0KHz

05

Resonance Frequency (Fo)

1100 Hz ± 20% at  Fo, 1V

06

Sensitivity (S.P.L.)

93dB(0.3W/0.1m) ± 3 dB    

at  AVE

1.0K,1.2K,1.5K,2.0KHz

07

Frequency Range

Fo – 20KHz

08

Distortion

Max 8 % at 1 KHz,0.3W.

09

Max. Input Power

Must be normal at 0.5W white noise for 1 minute

10

 Voice Coil

Diameter 5.7 mm

11

Magnet

Rare earth permanent (Nd-Fe-B) magnet Φ5.2x1.3 mm

12

Weight

0.72g ± 0.1g

13

Appearance

Should not exist any obstacle to be harmful to normal operation; damages, cracks, rusts and distortions, etc

14

Operation Test

Must be normal at program source 0.3 W

15

Buzz, Rattle, etc.

Should not be audible at 1.55V sine Wave between Fo to 20KHz

16

Polarity

When positive voltage is applied to the terminal marked (+), diaphragm should move to the front.

17

Terminal Strength

Capable of withstand 1kg load for 30 seconds without resulting in any damage or rejection.

18

Temperature

Operating temperature: -20℃ to +60℃

Storage  temperature: -30℃ to +70℃

2.Measurement Condition

Test and measurement will be carried out under normal condition of temperature

within 5℃to 35℃,relative humidity within 45% to 85% and air pressure of 860mbar to 1060mbar.

Should uncertainly arise in data obtained from the above atmosphere, control of temperature

At 20℃±2℃ and relative humidity within 60% and 70%, with air pressure remaining unchanged, To be enforced.

1.Microphone : B&K 4191

2.Standard Baffle : In IEC 268-5 Where 1350mm x 1650mm

3.Testing Distance : 0.1m

4.Zero Level : -dB

5.Mode : SPEAKER

6.Input Power : 0.3 W

7.potentiometer Range : 50dB

8.Sweep Time : 0.5sec

3.Standard test condiction of speaker