7mm Speaker Driver Unit Manufacturer

• 1. Type: Dynamic Speaker
• 2. Dimension: Outline Dimension Shall Be As Shown In Fig(1).
• 3. Weight: Approx 0.3 Grams.
• 4. Magnet: Material: Nd-Fe-B
• 5. Impedance: 32 ± 15% Ohm at 1000Hz. 0.2V
• 6. Power Rating: Normal| 3m W | Maximum: 5m W
• 7. S.P.L.: 92±3dB/1.0mWatt 0.01Meter. At 1000Hz.
  Measurement Method Shown In Fig(2).
• 8. Frequency Range: 20~20,000Hz.. Frequency Response Fig (3).
• 9. Distortion: 5% Maximum At 1000Hz. 1.0mW.
• 10. Abnormal Sound Test: Must be Normal Tested by 0.30 Volts. Sine wave for20~2kHz
• 11. Polarity: Diaphragm Shall Move Forward When Apply a Positive DC.
  Red “+” or“ Marked” Terminal

• 12. Operating Temperature: -20 °C to +55 °C
• 13. Storage Temperature: -25 °C to +65 °C
• 14. Reliable Test: After any following test leave speakers at room temperature for 1 hour, SPL shall not deviate by ± 3 db from initial value
• 14-1.Load Test: white | noise for 96 hours at 3m W input power.
• 14-2.High Temperature Test: +65±2 °C 96hours
• 14-3.Low Temperature Test: -25±2 °C 96hours
• 14-4.Humidity Test: +40±2 °C relative humidity 90~95%R.H 96hours
• 14-5.Vibration Test: Frequency 30 ± 15 Hz, Amplitude 1.5 mm for 2 Hours per axis(x. y. z axis)
• 14-6.Temperature Cycle test: -25~ + 65 °C | 5 Cycles Temperature test.