Any way to fix my headphones?

Any way to fix my headphones?
Just a while ago my headphones started working weird, the voice lines in music sound muffled, distant, and bass silences the headphones, it's like music is in front and the singer is in the back, opened the left ear up where the cables are located, none are broken off, I have no idea what could be causing it, thanks in advance for the help.

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