My right speaker is quiet and missing some parts of the music

[AC Question]

I've recently gotten a problem with my LG Volt, with all earphones and six cords in my car. The music plays fine on the left side, but the right earphones or speakers in my car only play quieter and missing some instruments and vocals, like the equalizer was dragged for only half the speaker. It doesn't really make sense to me, but even my back car speakers are quieter than my front ones, and play even less parts of the music. I can set my radio to only play the back right speaker, and you'll only hear like faded guitar, and the back left speaker is faded drums. I guess my aux port could be dirty, but I can't find any info online about this situation.