Hi! At the moment I still have my standartsystem in the audio! 2 loudspeakers in the front of the amature board, 2 on the rear shelf (build-up louds from the predecessor. All this is simply connected to the radio! I have sometimes only put a double subwoofer with power stage inside the case room! My question! What can I build in the car like, so that I have good (if I like to be loud), strong sound in the car? How do I have to build crossovers and where. Where do I have to build an end stage before……usw. What can i You recommend me? ASO: I have a Pioneer DEH – 3730MP Most of the time I hear something like Brooklyn Bounce and House and stuff with a lot of bass.