I think my subwoofers were bridged incorrect help?

lettof

New member
what happened was i had a friend install them because he had it installed in his car first so i figured he had no problems so neither would i.
He installs it and it works for about 30mins or less. All of a sudden the subs make a flapping noise than the subs stop working. The power light is still lit on the amp but no sound.

Is it possible for the subs to be bridged incorrect and work for a short period of time before it effects anything? Does anyone think they know the problem. Sorry for the lack of details, i didnt do the installation myself. But i do know theres no problem with the (power, ground, or remote).
 
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