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Reliability Testing

Type of Test

Test Specifications

High Temperature Test

96 hours at +85°C ± 3°C followed by three hours in

normal room temperature

Low Temperature Test

96 hours at -40°C ± 3°C followed by three hours in

normal room temperature

Humidity Test

96 hours at +55°C ± 3°C with relative humidity at

95% in accordance with IEC 68-2-67.

Temperature Cycle Testing

The part shall be subjected to 20 cycles using the

following procedure:

Low temperature: -40℃±3℃

High temperature:+85℃±3℃

Cycle: 30 mins at High, 10 seconds High to Low, 30

mins at Low, 10 seconds minutes Low to High

Vibration Test

10 to 55 to 10 Hz sine sweep, per minute @

1.5mm amplitude

2 hours in each axis X, Y, and Z

Drop Test

Mount speaker to 150g fixture, drop fixture 1.5

meters, twice per side and twice for each corner

Load Test

DUTs shall be tested under each specified

climatic condition for a continuous period of

100 hours at rated noise power. Speakers

mounted in a 1cc back cavity; simulated

program signal (IEC 268-1) with crest factor

of 1.8~2.2 ，in rated frequency range; high

pass 12dB/Oct or steeper, cut off at 850Hz.

Refer to IEC 268-5.

After each test, the speaker’s SPL shall be ±3 dB of the original SPL