you might be having some misconceptions here. If you think stock speakers have better midbass, you are mislead. Stock speakers actually play sub bass aka down to 40-50hz strong because they are full range drivers. Midbass takes a lot of door prep, literally turning the door into a proper speaker enclosure via deadening, mass loaded vinyl, CCF and even some plastic filled acoustic insulation to absorb the back wave. Afterwards the midbass response is a powerful snap and thud that punches your chest, not the boom you get from your stock speakers.