Subs just randomly stopped working please help

[Kile791985]

Hello any help would be so grateful. I have 2 amps in my jeep. A 4 channel aor interior speakers and a 2 channel for my subs.
Today I was playing music like normal nothing out of ordinary and in the middle of the song the sub woofer just stopped working.
I still have power and lights working on the capacitor and the power light still comes on for the amp.. ground wire is fine...music still plays out of door speakers but no subs.
Any suggestions?? Please help.. I did check for loose wires first of course and I see nothing.

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