Unhappy [Q] LOW Music quality in china smartphones

Recently i started buying china made smartphones by local brands like Karbonn and AUXUS and the sound quality on the headphones is just stupid. I used Apple earpods and also tried some mods like Viper4android and i changed to EQ to get deep bass but its making my phone to skip the bass parts like deepbass instead its just unable to give the output. So my question is.. is there any other option like hardware mod or anything else? both phone sounds same stupid. My phones are Karbonn A12+ and AUXUS Linea l1.
please suggest me what to do. (Before i use to have IPhone but now its broken so changed to android)
i attached audio clip recorded with my pc mic of my AUXUS Linea l1.
Attached Files
File Type: wma Untitled.wma - [Click for QR Code] (443.3 KB, 1 views)