Weak signal from amp

[w0lv3121n3 10+ year member]

I have a JL Audio set up.

JL Audio 500/1 amp

JL Audio 12w6

All connected with a 4awg wiring kit.

Everything worked perfectly up until couple days ago.

The amp still gets green power light.

All of a sudden the subwoofer gets very little power ( I can feel the subwoofer move little bit ).

All the settings are set on half way and set on low voltage.

Rechecked all wires ( ground, power, remote, rca, speaker cables )

I can not figure out whats wrong with it.

Any help would be appreciated.

Thank You.

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