Audio Quality topic

Having some issues regarding audio quality. over 92% of my phone's use goes to listening to music through headphones. ALL my past phones have all been HTC running PowerAmp and i have been happy. Unfortunately the audio quality in my Samsung is whack. i changed my mixer settings to get it to be a bit louder at least but when it comes to applying any sort of EQ, the quality is severely damaged. I can't really touch the PowerAmp EQ without bass distortion. i Also tried applying the MusicFX tweak but that only worked once upon enabling. Disabling broke it. and it didn't really work great anyway.

Can anyone shed some light on this? Is there a mod for KitKat that is worth checking out?