try swap it with another one and keep it wired the same, if another sub does the same thing, it's a wiring problem, if the same sub in a diff location in the box is still different than the rest, the woofer is most likely cooked
try swap it with another one and keep it wired the same, if another sub does the same thing, it's a wiring problem, if the same sub in a diff location in the box is still different than the rest, the woofer is most likely cooked