You know, it is actually way harder to calibrate the quality of the sound in a car. It is really ... complicated because there are many more factors that actually affect the sound in a car. First of all, it is a moving object, and the sound insulation is also really important when calibrating a sound system in a car. So yeah, it is way way tougher, in case you actually want to make it work perfectly. You could actually find some really useful information about it on cararac, as they are having a lot of great articles, and all of them are related to cars.