All of a sudden my amp stopped working. All of the fuses are good and all the conections seem correct and the green light on the amp is lit. but my sub isn't pounding or producing any noise. Could it be my sub that is out or is my amp done for?

Could be the amp is blown but again you said the amp is on. So it could be the sub. I would try a door speaker and set the amp settings to low and see if you get sound..

Could be the sub or amp just got to test them both out.

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97"Ford Ranger 2.3L

Mods: Headlights 8k HIDs, Green Fogs HIDs, FlowMaster 40 Series, Tails lights, Shaved Tail gate,Roll pan, 5/6 lowered, Ibeams, 2in coils, Flip kit, Honda Metallic Paint

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Or you could ohm your sub... would probably be easier and quicker