MODEL: SP-7140

PRODUCT: Dynamic Speaker

EDITION: C/2017

RELIABILITY TESTS

After these tests , the change of S.P.L will be within ±3dB

HIGH TEMPERATURE TEST

high temperature

duration

96 hours (leave 6 hours in normal temperature and then check)

LOW TEMPERATURE TEST

low temperature

duration

96 hours (leave 6 hours in normal temperature and then check)

HUMIDITY TEST

temperature

relative humidity

92%~95%

duration

96 hours (leave 3 hours in normal temperature and then check)

VIBRATION

10Hz ~55Hz ~10Hz sine-wave sweep 15 minutes 5G(constant)

X, Y, Z

3 directions, 2 hours each, total 6 hours

TEMP./HUMIDITY CYCLE

The part will be subjected to 5 cycles. One cycle shall be 6 hours and consist of:

DROP TEST

Drop speakers contained in normal box on to the board 40mm thick 10 times from the height of 75cm

LOAD TEST

Rated Power Pink noise is applied for 24 hours at room temp.

LEAD WIRE PULL STRENGTH

The pull force will be applied to double lead wire:

Horizontal 3.0N (0.306kg) for 30 seconds

Vertical 2.0N (0.204kg) for 30 seconds

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