Here is my headphone volume boost mod for Xperia Z1/Z1c... It will boost only headphone volume..
Why only headphone? Because in my openion,it is the safest volume boost and I always use headphone for listening music
There is no bug in this mod...Such as Audio not recording via 3rd party apps etc...
Best Settings for this mod
To set the shown equalizer preset easily,just select "Rock" preset and increase the "clear bass" to 8
.: Download Headphone volume boost for stock K.K 4.4.4 :.
*** Flash through recovery***
Thanks to @danw_oz for confirming that this mod also works on Z1c