Rare earth permanent (Nd-Fe-B) magnet Φ12.5 x 2.5mm
12
Weight
40 g ± 2 g
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 –0.25W
15
Buzz, Rattle, etc.
Should not be audible at 1.41V 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
Load Test
0.25 W 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