Equalizer doesn’t work for on my iphone11 korean variant

Hello Joelshi09,

Thanks for choosing the Apple Support Communities. If we understand correctly, your equalizer isn't working on the Music app. We can understand why you'd reach out for a solution.

To start, what happens when you try to use the equalizer?

Also, here is a resource that can help.

Change the way music sounds on iPhone

Cheers!