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Are you computer audiophile? If so, Fidelizer will help you enjoy the music on computer even more.

    Fiio X5iii Purist ROM version 1.2.0 released without wiping data required!


    Fidelizer Mod


    For new users, please read about PerfectDynamics Sound Optimizations first for new improvements with Fidelizer ROMs.


    I received information about Fiio launching big update for Fiio X5ii, X7 and X7ii at the same time. As I’ve been busy with many projects including Fidelizer 8 updates so I can release only one at time and I’ll start with the most popular Fiio X5iii first. 🙂

    After launching firmware updates for a while, I realized most customers are returning users so wiping data again won’t be necessary anymore. I also tuned PerfectDynamics on Enhanced / Advanced ROM to reduce bright sound with stock hardware on some headphones.

    -Based on firmware version 1.2.0
    -Apollo – Fidelity Edition from included
    -build.prop tweaks for better video and storage performance and improve battery life
    -bundled audio effects removed but keep main engine (Poweramp works now)

    Download: Fiio X5iii Purist ROM


    Installation Guide

    1. Download Firmware Upgrade Tool from
    2. Turn off Fiio X5iii
    3. Connect X5iii with USB connection to computer while holding previous track button
    4. Install RK USB driver included in Firmware Upgrade Tool and replace update.img image with ones from Fidelizer.
    5. Open X5III Firmware Upgrade Tool.exe and flash ROM according to instructions provided in Instructions of How to Use the X5 3rd gen Firwmare Upgrade Tool.pdf


    There’s a lot of improvements for Advanced ROM and I also added Enhanced ROM into collection too. Please read Portable Products for more details including Fiio X5iii Fidelizer Mod project with 3 modification levels. Happy listening. 🙂