01

Type

Dynamic speaker

02

Dimension

External diameter 40 mm

03

Rated Input Power

0.5W

04

Impedance

8 ohm ± 15% at 2KHz

05

Resonance Frequency (Fo)

450Hz ± 20% at  Fo, 1V

06

Sensitivity (S.P.L.)

80dB(0.5W/0.1m) ± 3 dB

at AVE 0.8K,1.0K,1.2K,1.5K(Hz).

07

Frequency Range

Fo – 5KHz

08

Distortion

Less than 10 % at 2000Hz 0.5W

09

Max. Input Power

Must be normal at 1.0W white noise for 1 minute.

10

Voice Coil

Diameter 13.4 mm

11

Magnet

Rare earth permanent (Nd-Fe-B) magnet Φ12.5 x 1mm

12

Weight

3g ± 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 0.5W

15

Buzz, Rattle, etc.

Should not be audible at 2.0V sine Wave between Fo to 5KHz

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

Load Test

0.5W white noise is applied for 96 hours and satisfy the test listed on item 05,06,13,15

19

High Temp. Test

Keep 96 hours at +70℃±3℃ and leave 3 hours in normal temperature and then check

20

Low Temp. Test

Keep 96 hours at -20℃±3℃ and leave 3 hours in normal temperature and then check

21

Humidity Test

Keep 96 hours at + 60℃±3℃ relative humidity 95% and leave 3 hours in normal temperature and then checked.

22

Drop Test

Drop 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

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 : 0.5W

7.potentiometer Range : 50dB

8.Sweep Time : 0.5sec