When I dail a system in it's catered for my hearing loss and my right ear is a lot weaker than my left. It's your typical equal loudness curve with a little more bite on the tippy top than a lot of people usually prefer. To be honest a good sounding automobile system is made by making the best out of a bad situation. Combine a bunch of highly reflective surfaces in close proximity with each other with locations that will always be a compromise in one way or another and you have a situation where a speaker is only as good as the room you put it in. NPDang couldn't have said it better.