| ITEM |
|
SPECIFICATIONS |
| 1 |
Type |
Dynamic speaker |
| 2 |
Dimension |
External diameter 18 mm |
| 3 |
Rated Input Power |
0.3 W |
| 4 |
Max. Input Power |
0.5 W for 1 minute. |
| 5 |
Impedance |
16ohm ± 15% at 1 KHz |
| 6 |
Resonance Frequency (Fo) |
1K Hz ± 20% at Fo, 1V |
| 7 |
Sensitivity (S.P.L.) |
84dB(0.1W/0.1m) ± 3 dB at 1K, 1.5K, 2K, 2.5KHz. |
| |
|
70dB(0.3W/1m) ± 3 dB |
| 8 |
Frequency Range |
Fo – 20K Hz |
| 9 |
Total Harmonics Distortion |
Max 10 % at 1 KHz,0.3W. |
| 10 |
Voice Coil |
Diameter 8.5 mm |
| 11 |
Magnet |
Rare earth permanent ( Nd-Fe-B ) magnet Φ 7.8×1.3mm |
| 12 |
Weight |
1.9g ± 0.2g |
| 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 0.3W |
| 15 |
Buzz, Rattle, etc. |
Should not be audible at 2.19V 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 +50℃ |
| |
|
Storage temperature: -25℃ to +60℃ |
