MODEL: SP-1208

PRODUCT: Dynamic Speaker

EDITION: A/2016

TEST METHOD

SPL AND FREQUENCY RESPONSE CURVE

The loudspeaker in 0.5cc box shall be mounted in specified baffle, the measuring microphone shall be free-field microphone and

placed at specified distance from DUT, on axis. The drive power is 0.4Watts, and swept sine-wave range is 20Hz to 20kHz with a

R40 of test sequence.

THD

Tested per Section 9.1 and driven at 0.25Watts , sweep at specified frequency range with R40 test sequence.

Figure 3 Test setup

Speaker Measurement Circuit

RELIABILITY TESTS

The sound pressure as specified shall neither deviate more than ±3dB from the initial value, nor have any significant damage after any of

following testing.

HIGH TEMPERATURE TEST

high temperature

duration

96 hours

LOW TEMPERATURE TEST

low temperature

duration

96 hours

HEAT SHOCK TEST (See in Fig. 4)

high temperature

low temperature

changeover time

< 30 seconds

duration

1 hour

cycle

10

HUMIDITY TEST

temperature

relative humidity

90~95%

duration

48 hours

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MT-1000

display