M&K MX350THX Subwoofer repair

I picked up a M&K MX350THX subwoofer super cheap recently.

The cones moved a little but virtually no volume. I visually checked the main logic board and didn't see anything obvious. I then the power supply. One cap had brown stuff coming out of the top so I ordered 4 new caps of the same manufacturer and specs. Could this bad cause almost no volume?

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