28mm Multimedia Speaker Driver Unit for Speaker Box

• 1. Type: Dynamic Speaker
• 2. Dimension: Outline Dimension Shall Be As Shown In Fig(1).
• 3. Weight: Approx 16 Grams.
• 4. Magnet: Material: Nd-Fe-B
• 5. Impedance: 8 ± 15% Ohm at 1000Hz. 1V
• 6. Power Rating: Normal | 1.0W | Maximum | 2.0W
• 7. FO: 370±20% Hz
• 8. S.P.L.: 92±3dB/1.0Watt 0.1Meter. Average At1000.1200.1500.2000 Hz.
  Measurement Method Shown In Fig(2).
• 9. Frequency Range: FO~20,000Hz.Average SPL-10dB.Frequency Response Fig (3).
• 10. Distortion: 10% Maximum At 1000Hz. 1.0W.
• 11. Abnormal Sound Test: Must be Normal Tested by 2.83 Volts. Sine wave for50~5kHz
• 12. Polarity: Diaphragm Shall Move Forward When Apply a Positive DC.
  Red “+” or“ Marked” Terminal

• 13. Operating Temperature: -20 °C to +55 °C
• 14. Storage Temperature: -25 °C to +65 °C
• 15. Reliable Test: After any following test leave speakers at room temperature for 1 hour, SPL shall not deviate by±3 db from initial value
• 15-1.Load Test: white noise for 96 hours at 1.0 W input power.
• 15-2.High Temperature Test: +65±2 °C 96hours
• 15-3.Low Temperature Test: -25±2 °C 96hours
• 15-4.Humidity Test: +40±2 °C relative humidity 90~95%R.H 96hours
• 15-5.Vibration Test: Frequency 30+15 Hz, Amplitude 1.5 mm for 2 Hours per axis(x. y. z axis)
• 15-6.Temperature Cycle test: -25~ + 65 °C | 5 Cycles Temperature test.