SF DRIVER™

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

 

 

 

 

 

Block Diagram & Response curve

Test condition : IEC711+Rubber

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Structure

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1.   Frame :  PBT

2.   Magnet :  NdFeB

3.   Plate :  SPCC

4.   Voice coil :   DHT 0.03

5.   Yoke  :  SPCC

6.   PCB  :  0.4 T

7.   Diaphragm :  PEEK 46㎛, 3layer

8.   Unit Damper :  530#

 

 

 

 

 

Dimensions

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