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| ITEMS. |
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SPECIFICATIONS |
| 1 |
Type |
Dynamic receiver unit |
| 2 |
Dimension. |
External diameter 28 mm |
| 3 |
Sensitivity (S.P.L) |
93 dB ±2 dB at 1kHz 60mV with IEC 318 coupler |
| 4 |
Frequency Response. |
Refer to frequency response chart. |
| 5 |
Impedance. |
150 Ohm ±20% at 1KHz |
| 6 |
Magnet Field Intensity. |
Axial – dB , Radial –dB at 1KHz |
| 7 |
Max. Input Power. |
Must be normal at a white noise , 50mW for 1 minute. |
| 8 |
Weight. |
5g ±0.5g |
| 9 |
Appearance. |
Should not exist any obstacle to be harmful to normal operation:
damages, cracks, rusts, and distortions, etc. |
| 10 |
Buzz, Rattle, Etc. |
Should not be audible at 1V sine wave between 300 Hz to 3.4 kHz. |
| 11 |
Terminal Strength. |
Capable of withstanding 1 kg load for 15 sec without resulting in
any damage or rejection. |
| 12 |
Load Test. |
1mW white noise (-filter) is applied for 72 hours satisfy the tests
listed on item 03,04,09, and10 |
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