LOUDITY ELECTRICAL AND ACOUSTICAL SPECIFICATION Item LD-SP-2808 Dimension 284.7t Rated Input Power 0.5W Max Input Power 1.0W Rated Impedance 815% /2KHz/1V Resonance 40020% Hz/1V Frequency(f0) Sound Pressure Level 813 dB at (AVG 0.8,1.0,1.2,1.5)KHz 1W/1m baffleboard (IEC) Frequency Range 300HZ ~ 6KHz Total Harmonic Distortion 5%MAX. at 1KHz, 0.5W Flux Density 0.6T Polarity When a positive DC Current is applied to the voice coil terminal marked +or red ,the diaphram shall move forward OperationTest Must be normal at sine wave and program source 0.5W. Buzz,Rattle,etc. Should not be audible at 2.0V sine wave between (300 Hz ~ 6kHz) Weight 6 g Voice Coil Diameter 10.4 mm Magnet (NdFeB) 9.51.5t mm Appearance Should not exist any obstacle to be harmful to normal operation damages,cracks,rusts and distortions,etc. LOUDITY ENVIRONMENTAL TEST Item LD-SP-2808 Keep 96 hours at +60C3 C and leave 3 hours in normal temperature High temp. Test and then check Keep 96 hours at -30 C 3 C and leave 3 hours in normal temperature Low temp. Test and then check Keep 96 hours at + 40 C 3 C relative humidity 95% and leave 3 hours Humidity test in normal temperature and then checked. Low temperature: -30C 3C, temperature:+60C 3C, cycle: 1 Thermal cycle test. hour/cycle each, and then keep 5 cycles in a room. 10~55~10Hz sin-wave sweep 15min. 5G(constant) Vibration X,Y, Z 3 direction. 2 hours each, total 6 hours. Free drop a unit from 100cm height to a board of 20mm thick x,y, z 6 Drop test direction. 1 times each, total 6 times. Rated Power white noise is applied for 96 hours Load test Max power 1 min on 2 min off 10 cycles. Max Power test Capable of withstand 1kg load for 15seconds without resulting in any Terminal strength test damage or rejection. PASS CRITERION : After these test , the change of S.P.L shall be within 3 dB .