hey, just recently i looked at the car and underneath the glove box there are 2 small black boxes that say "Passive Crossover Network" on them. There are buttons on it that say 'Low Pass' 'High pass' I'm not sure exactly what these are. I also have a 'Proton' amp underneath the passenger seat. These are aftermarket speakers, I believe the company is ADS for both the speakers and 'passive crossover network'.
This info might have been useful before i assume
please enlighten me brandon, thank you very much in advance.