79dB/W(m) ± 3dB at AVE 1.0, 1.2K, 1.5K, 1.8K, (Hz)
7
Sound Pressure Level
93dB/0.3W(0.1m)
8
Frequency Range
Fo – 20 KHz
9
Distortion
5% Lessthan 0.3W 1500Hz Morethan
10
Max. Input Power
Must be normal at 0.6W white noise for 1 minute.
11
Voice Coil
Diameter 11 mm
12
Magnet
Rare earth permanent (Nd-Fe-B)Magnet 9.5 x 1.5 mm
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 Hz to
20KHz
16
Polarity
When positive voltage is applied to the terminal marked (+),
diaphragm should move to the front.
17
Terminal Strength
Capable of withstanding 1 kg load for 30 seconds without resulting
in any damage or rejection.
18
Load Test
Must be normal after load test:white noisc 0.3W 24 hours
19
High Temp. Test
Must be normal after 70±2℃ and relative humidity 20~25% 24
hours and then room temperature 1 hours
20
Low Temp. Test
Must be normal after -25±3℃ and relative humidity 20~25% 16
hours and then room temperature 1 hours
21
Humidity Test
Must be normal after 40±2℃ and relative humidity 20~25% 24
hours and then room temperature 1 hours
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 tests listed on test 13 and 15
