Does anyone know what size the speakers are in the 12 speaker system and where they are? I only count 11. Is there a subwoofer in the center console? I’ve heard that replacing the speakers with better quality speakers with the same ohm makes a big difference with these Bose systems. For a 12 speaker system, it doesn’t sound the best. I installed a custom 8” JL Audio W7 under rear seat and that made the bass obviously sound better but it still seams to be missing something.