Installing A Car Stereo System Throughout this project, each component will be required to be compatible with the other components chosen. The dual purpose for this is to keep cost factor low and facilitating installation. Several adaptors can be eliminated by having compatible components. Five major components will be used in this system, the head unit, the front speakers, the rear speakers, the subwoofer, and the subwoofer amplifier. Head Unit The head unit is the most important component and must have certain features to make it adequate for this system. Some of the features we will not be using immediately but will require in case expan