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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; input shall be simulated program

signal (per IEC 268-1) with crest factor of 1.8 to

2.2 in rated frequency range for a period of 1

second. And the test shall be repeated 60 times

with intervals of 1 min. Refer to IEC 268-5.

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