En tunn högtalare, 4mm tjock och 40mm i diameter.
Effekt: 0.25W
1 Type Dynamic speaker
2 Dimension External diameter 40 mm
3 Rated Input Power 0.25 W
4 Impedance 8 ohm ± 15% at 1500Hz
5 Resonance
Frequency (Fo)
440 Hz ± 20% at Fo, 1V
6 Sensitivity (S.P.L.) 85dB(W/m) ± 3 dB at AVE 0.6K,0.8K,1.0K,1.2K(Hz).
96dB(0.25W/0.1m) ± 3 dB
7 Frequency Range Fo 20KHz
8 Distortion Less than 10 % at 1500Hz 0.25W
9 Max. Input Power Must be normal at 0.4W white noise for 1 minute.
10 Voice Coil Diameter 10.8 mm
11 Magnet Rare earth permanent (Nd-Fe-B) magnet F10 x 1.5mm
12 Weight 11g ± 2g
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 0.2 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.
