tech help

[bman863]

Hey guys, my subwoofer stopped putting out sound a couple of months ago and i've since replaced the amp and stereo to try to solve the problem. they both played cd's and radio fine out of the door speakers. the amps have power. but the sub still doesn't play. i've tested it on my home stereo and it works. i've turned the rca outputs on on both cd players and nothing. So, all the components: the stereo, the rca wires, the amp, and the sub have been replaced to no avail. any help would be greatly appreciated!!!!

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