So you love your music, and you play it all the time whether at home or more often than not in the car, but do you know the difference between music and great sounding music, or does it make a difference to you how good your music sounds? Often modern cars have an option to upgrade all the audio equipment, this will often increase the quality of the audio (or video) especially when the volume is turned up. However If you haven't upgraded any of the factory fitted equipment in your car it's likely that you haven't experienced good sounding music. So the question is do you want to hear your music how it should be played. If so you will need to go aftermarket.