I bought these to replace my old speaker system which was based on an old positive/negative speaker. The first exploded three weeks later, initially leaving a humming noise, and soon the system stopped making noise. Luckily it was within the return period so I went back and replaced it. The second lasted 5 weeks before the same problem appeared. Unfortunately I can't return it now so I'm stuck with a dead box. Both are manufacturing defects, meaning poor quality parts or poor quality control are used. Given that many other people are also reporting broken speakers and parts, I would say
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