Stereo upgrade help? 2012 cooper S
 

I have a 2012 s coupe. I believe it would be a R56. It has the HK stereo. I was wondering if the Speaker crossovers are controlled from the amp or at the speakers. . I was wanting to just swap out speakers and be done with it but if they are crossed over at the amp not sure that will help. Also is there any wiring adapters out there to switch out at the amp to avoid cutting wires if I wanted to run new amp and add a sub? Crutchfield had no Answers.
Thanks Rory