Speakers

You are driving down the street and you feel a slight vibration through your car, it is the bass from the neighboring vehicle and no music. One begins to wonder is there any way of capturing the bass and rather than expressing it out to the public, keeping it within your own vehicle and feel the bass/sub. The sacrifice one makes is either you have to turn the volume low and the bass on high to actually feel the music, but then the music is gone and all you hear is the vibration. It would be really nice to have a speaker/sound system for a vehicle that could simply play your music at a volume loud enough that the sub can be heard but not too loud to make the driver deaf or the neighboring cars vibrate as well.