Far Cry New Dawn has 10 MP3 Player Locations. Finding all of these Music Players unlocks the Audiophile trophy or achievement and completes the “Audiophile” Side Mission. They also add new soundtracks to your radio.
You can hear them when you get close enough. This is a type of collectible that can be revealed on your in-game map by upgrading the Cartography Station at Prosperity (your home base) and buying the map from there. They are available from the start of Act 1. None of them are missable, they can still be collected after the story. Some require the Grapple Perk so make sure you have that before you start.
Below you can find a guide for all their locations going from south to north.
MP3 Player #1
The first music player is at “Bradbury Woods”. It’s just one cabin. At the corner, there is a wall of wooden planks that you can break with your fists or weapons. Behind that are the headphones.
MP3 Player #2
This is at Big Mike’s Dale. Open the Hatch behind the house and climb down into the bunker where the music player is located.
MP3 Player #3
Found at Fillmore’s Hovel. Like the last collectible you must open a hatch to an underground bunker to reach the music headphones.
MP3 Player #4
At the Lake north of “The Chop Shop” Outpost. There’s only one building but the door is locked. To enter, swim around the back and use the Grapple to enter through the window (requires Grapple Perk).
MP3 Player #5
Found in a cave called “Frobishner’s Memory”. Inside the cave look up to the ceiling to find a Grapple Hook. Use it to reach the MP3 player one floor above (requires Grapple Perk).
MP3 Player #6
Found at Sergey’s place, in a broken train compartment.
MP3 Player #7
Found at Sein’s Sanctuary, destroy the wooden floorboards in the garden area to reveal the MP3 player.
MP3 Player #8
Found at Rotgut Pass, inside the house. Enter the building and you’ll see a locked door. Use the Lock Picking Perk or grab the key from the shelf directly across from the door (same room where the locked doors is, see the key circled in red on screenshot). Behind the locked door is the music player.
MP3 Player #9
Found at Forgotten Barracks, just west of Empty Garden Outpost. Enter the house and inside you’ll hear the MP3 player behind a locked door. Use the Lock Picking Perk or grab the key from under the table, directly across from the locked door (same room). Destroy the wooden boards under the table to reveal the key. The MP3 player is behind the locked door.
MP3 Player #10
Found at Tombwater. Again we have to enter a house with a locked door. Destroy the fridge inside the house to reveal the key. Simply shoot the freezer door of the fridge with a gun and grab the key from it. Now you can open the locked door (alternatively, use the Lock Picking perk). The final MP3 Player Collectible is behind the locked door.
Those are all 10 MP3 Players in Far Cry New Dawn. After finding all of them it will complete the Audiophile Side Missions and reward you with the Audiophile trophy or achievement.