I recently just bought a new head unit for my mdx but i just noticed that my factory radio has 4 plugs on the back. (2 grey, 2 blue) im assuming 1 plug is for the steering wheel controls and im not sure what the others are because my dash kit only came with 1 adapter. I know i have a factory amp and woofer, so my question is what can i do to have all my speakers working properly with this new head unit.

 

(Moved to correct forum)

 

Integrated sound systems in most modern cars are not readily amenable to "upgrading" with aftermarket units. Check for a compatible adapter fro Scosche or Crutchfield.

Having said that, I doubt its going to sound any better than the Bose unit and may, indeed, not sound as good.