You can create several Personalized Profiles and switch between them to compare how each one sounds.

1. In the game, go to Settings → Audio → Enhanced Headphone Mode. For your first profile, select View Set Up, then Try Now for 14 Days. If you already have a profile, select Scan QR Code.
2. Scan the QR code with your phone.
3. If you don't have a profile yet, follow the prompts to create one.
4. Once you have at least one profile, you can create more from the Settings menu on your phone. See Dying Light | How to Add a New Personalized Profile.
5. At the top of the screen, scroll through your profiles and tap Enable on the one you want.
6. You'll see "Your new profile is selected."
7. Return to the game and turn Enhanced Headphone Mode off, then on, to switch to that profile in-game.