I mean, it's possible... but by time you make it work, you could easily have yourself a pretty nice aftermarket system. Also, who said you have to deal with digital EQ if you go aftermarket? There are plenty of EQs if you prefer knobs/buttons/sliders... from 1/2-din dash units to full-blown trunk-mounted units. Again, can it work? Yes... do I personally think it would be worth the time invested when compared to researching and piecing together an aftermarket system to suit your needs? Absolutely not. I understand liking the sound of it... but I truly believe that you can achieve much better results by utilizing the amazing array or aftermarket car audio products available to us today.