For new users, please read about PerfectDynamics 2.0 Sound Optimizations first for new improvements with Fidelizer ROMs.

 

I’ve been trying to update PerfectDynamics 2.0 update on iBasso DX50/80/90 for a long while. Whenever I tried to start updating one, new ROMs and updates keep coming out. So after porting iBasso DX220 ROM to DX200 device, I decided to finish this update.

There’s still iBasso DX100 left which I will need to test with actual device (like I did on this update). iBasso DX150 will also receive DX220 ROM port soon too so stay tuned. 🙂

If you still use good old iBasso DX50/80/90, you can check out Fidelizer Purist ROM first and see. If you’d like to upgrade with PerfectDynamics Sound Optimizations in Enhanced / Advanced ROM, there’ll be a lot of improvements that won’t disappoint those who can appreciate Purist ROM. 🙂

Last week I received bug report from iBasso DX90 user that player sometimes stop playing next song. It didn’t happen during the tests because it often happened after 10 songs played, sometimes after second loop of the album.

I spent the whole week investigating why this happened and I found that removing Equalizer and Gapless on Advanced Purist ROM will trigger this bug. To resolve the case, I brought back those features in Advanced Purist but kept audio effect engine removed.

iBasso DX50/80/90 will contain the following features as below:

-Based on most recent version from official iBasso website
-System font was replaced with lighter version of Nimbus font
-build.prop tweaks for better video and storage performance and improve battery life
-audio engine optimized for only audio playback (EQ/Gaplass features work)
-bundled audio effects removed but keep main engine

Download: iBasso DX50 – DX80 – DX90 Purist ROMs

Installation Guide

1. Extract update.img from archive and copy to internal storage (or the micro SD slot 1 for DX80)
2. Open device Settings > Advanced > System Update
3. Wait for device to finish flashing
4. After flashing is completed, I recommend choosing Slow filter

 

For Mac / Linux users, please check this guide for flashing Fidelizer Purist ROM on Mac / Linux instructions.

 

There’s a lot of improvements for Enhanced / Advanced ROM with PerfectDynamics Sound Optimizations. Please also check Portable Products for more details about ROM upgrades and hardware modification.

 

Before publishing Fidelizer ROMs for iBasso DX200 unit, I used to release Fidelizer ROMs for iBasso DX50/80/90 too. However, the project was on hold due to unfavorable interference in Head-Fi.

Yesterday, I received order for Advanced ROM of DX80 and I also was tipped for DX50 a day before as well. So, I spend all day baking and cooking all iBasso DX50/80/90 ROMs which are 15 ROMs in total. It was very exhausting.

iBasso DX50/80/90 will contain the following features as below:

-Based on most recent version from official iBasso website
-System font was replaced with lighter version of Nimbus font
-build.prop tweaks for better video and storage performance and improve battery life
-audio engine optimized for only audio playback (EQ/Gaplass features work)
-bundled audio effects removed but keep main engine

Download: iBasso DX50 – DX80 – DX90 Purist ROMs

Installation Guide

1. Extract update.img from archive and copy to internal storage (or the micro SD slot 1 for DX80)
2. Open device Settings > Advanced > System Update
3. Wait for device to finish flashing
4. After flashing is completed, I recommend choosing Slow filter

Since many people asked for Gaplass and Equalizer, I decided to lower the bar for people who want it. This is different from Advanced ROM I cooked for some members before but that’s as far as I can do to keep up with compatibility request.

You can read more about Enhanced and Advanced ROM upgrades in Portable Products section. I’ll introduce Fidelizer Mod for them soon.