Need help with amp has power, no output

[Macey54]

So I am stumped. My system has worked great for years. All of a sudden I started the truck one day and my subs weren't playing. I have a 12" pioneer running off my cpt1-2000.

Anyways, power and ground check out. Remote wire checks out. Sub is functioning. And I have signal from my rcas. I've tried playing with Hu and amp settings. Could this be anything other than a cooked amp? This just seems unlikely because all I've played in the last year is country....

Any help would be greatly appreciated!

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