Bose was (still is) famous for designing integrated systems that work really well together as a package. I still have my Bose 301 bookshelf speakers I bought in the 1980's and a mini-cube home theater speaker/subwoofer set I bought in the early 2000's. They sound fantastic, just last forever. I never had to have a repair, but if I did... I could just drive it down the turnpike to Framingham, MA and drop it off for service.
Bose was one of the first premium sound packages offered in production cars from the factory. They went with proprietary configurations and did things just a little differently. I think that was to keep people from swapping out components that might not be up to Bose engineering standards. Yes, you can replace a Bose speaker with something else (speaker, amp, etc.), but you need to match things like impedance in order for things to work.
As
@S33k3r mentioned... You'd need to match Bose system parameters for things to function properly.
