SF DRIVER™ 드라이버 사양

General

1. Out-Diameter : Φ8 mm

2. Height : 5 mm

3. Weight : 0.7 g

4. Operating Temperature range : –20 ~ +60℃ without loss of function

5. Store Temperature range : -25 ~ +70℃ without loss of function

Electrical and Acoustical Characteristics

Test condition : 15 ~ 35℃, 25% ~ 85% RH, 860~1060 mbar

1. Impedance : 24 Ω ± 15% (0.22V at 1kHz)

2. Sound Pressure Level : 95 dB ± 3dB (0.22V at 1kHz, based on 711+rubber test)

3. Resonance Frequency : 2.7 kHz ± 20%

4. Frequency Range : 100Hz ~ 9kHz

5. Input Power Rated : 3 mW / Max. 5 mW

6. Distortion : 5% Max. from 200Hz ~ 5kHz

7. Buzz and Rattle : Should not be audible buzzes,rattles when the 0.27V sine wave signal swept at frequency range.

8. Polarity : When supplied plus D.C. voltage to (+) terminal, the cone diaphragm must move to forward.

Reliability Test

After test(1~7 item), the speaker SPL difference shall be within ±3dB, and the appearance not exist any change to be harmful to normal operation. (e.g. cracks,rusts,damages and especially distortion).

1. High Temperature Test : After being placed in a chamber with +70 ± 3℃ for 96 hour and then being placed in natural condition for 1 hour, speaker shall be measured.

2. Low Temperature Test : After being placed in a chamber with -25 ± 3℃ for 96 hours and then being placed in natural condition for 1 hour, speaker shall be measured.

3. Humidity Test : After being placed in a chamber with 80%R.H. at +40 ± 2℃ for 96 hours and then being placed in natural condition for 1 hour, speaker shall be measured.

4. Thermal Shock Test : After being placed in a chamber at +60℃ for 1 hour, then speaker shall be placed in a chamber at -20℃ for 1 hour (1 cycle is the below diagram).After 6 above cycles, speakershall be measured after being placed in natural condition for 1 hour.

5. Vibration Test : After being applied vibration of amplitude of 1.5 mm with 10 to 55Hz band of vibration frequency to each of 3 perpendicular directions for 1 hour, then placed in natural condition for 1 hour, speaker shall be measured.

6. Drop Test : The speaker when mounted in the jig which weight 85g~100g, shall with stand 5 times random drops from a height of 1 meter to a concrete floor faced with 5 mm thick hard wood board.and be nothing mechanical damage.

7. Load test : After being applied loading white noise with input power 3mW (0.27Vrms.) for 96 hours, then placed in natural condition for 1 hour, speaker shall be measured.

8. Insulation test : When they are measured with DC 100V the insulation resistance between v.c. terminal and frame must be more than 1 MΩ Measurement