
| ITEM | 
 | SPECIFICATIONS | 
| 1 | Type | Dynamic speaker | 
| 2 | Dimension | External diameter 50 mm | 
| 3 | Rated Input Power | 0.5 W | 
| 4 | Max. Input Power | 1.0 W for 1 minute. | 
| 5 | Impedance | 8 ohm ± 15% at 1500Hz | 
| 6 | Resonance Frequency (Fo) | 300 Hz ± 20% at Fo, 1V | 
| 7 | Sensitivity (S.P.L.) | 92dB(0.1W/1m) ± 3 dB at AVE 0.6K,0.8K,1.0K,1.2K Hz. | 
| 
 | 
 | 97dB(0.5W/0.1m) ± 3 dB | 
| 8 | Frequency Range | Fo – 20KHz | 
| 9 | Total Harmonics Distortion | Max. 10% at 1K Hz ,0.5W. | 
| 10 | Voice Coil | Diameter 13.3 mm | 
| 11 | Magnet | Rare earth permanent (Nd-Fe-B) magnet Φ12.5 x 1.5mm | 
| 12 | Weight | 13.2g ± 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 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 +60℃ | 
| 
 | 
 | Storage temperature: -30℃ to +70℃ | 
 
                 
                 
                 
                 
                 
                 
                 
                 
                