NO. | Item | Specification | Condition | |
1 | Dimensions | 34*17H mm | ||
2 | Nomial Impedance | 4±15% OHM | At 1.0KHz / 2V | |
3 | Input power | Rated: 3W/ Max:4W | At 3.46V /4V | |
4 | Resonance Frequency | 330±20%Hz | At 2V | |
5 | S.P.L. | 76±3 dB(0.5W/0.5M) | At0.8K/1.0K/1.2K/1.5KHz (Average) | |
6 | Frepuency Range | F0~20K | Output S.P.L. -10dB | |
7 | Distortion | 5%Max | At 1.0KHz 0.1W/0.1M | |
8 | Buzze & Rattle | Not be audible sine wave between at 3.46V /250~3KHz. | ||
9 | Polarity | Diaphragm shall move forward. | ||
10 | Load test | Must be normal after load test:white noise 24 hours. | ||
11 | High TEMP test | After having been in a test chamber for 48 hours at the condition of +60 ℃ 20~25% R.H and keep 2 hours. | ||
12 | Cold TEMP test | After having been in a test chamber for 48 hours at the condition of -25℃ ±3℃ and keep 2 hours. | ||
13 | Humidity test | After having been in a test chamber for 48 hours at the condition of +40 ℃ 90~95%R.H and keep 4 hours. | ||
14 | Drop test | The speak shall be dropped 2 times, clause 8 shall be satisfied. | ||
15 | Weld | terminal weld: 350℃/≤2~3sec*2bit. | ||
16 | Store temp | -25℃ To +60℃ |