Subs have constant rumble

[Jason6795]

Hey all. Just took my car audio batteries out to build a box for them. When I hooked everything back up and turn it on. My subs have a constant rumble, but no music playing to them. Speakers play just fine. I know I've come across this before and can't for the life of me remember how I solved it. Will still rumble when rcas are removed, but will stop once I remove the sub wire leads. Come help me stop being a dummy and figure out what I did wrong

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