blown sub or no?

[StateProp486 10+ year member]

so i was driving home from work and playin my music like how i usually bump it loud. I was playin knockin heads off by lil jon im like half way home on a 30 min drive...and all of a sudden the bass sounds like its only playin half the volume. I dont know what happened. I have a hdc315 on a clarion dpx11500. Does it sound like i have a blown sub? or could it be something with the amp. thanks guys.

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