No rumble?

[Philly2Cincy]

I have a DB11 amp running a 15 inch American Basswith LOC a non-active LOC. I've had it hooked up for a year now and the other day not playing any crazy song that I haven't played before my sub stopped working. All the connections are there that fuses are both good. The in-line and the amp fuse the wire connections from the amp to the sub are good. The ground is good. The power cable is good.Amp still turns on and It's not in protection mode. Any idea on why I feel no rumble from my bass anymore? Is it possible that the connections inside the sub box itself have come apart?

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