Antennas and Mobility

FM stereo has a range of about 32 km (20 miles) before interference noises are heard. This means that in certain areas with tall buildings or hills, it is necessary to select the strongest possible station. The radio chassis automatically tunes to the center of any given station, eliminating the need for manual fine tuning.
The electric antenna will adjust to the fully extended height for best FM reception.

Although an automobile radio chassis will give outstanding mobile reception, it cannot provide the continuous reception of home audio components. The home receiver is not limited by the vehicle operating characteristics and certain geographical effects as is the mobile unit. For example, for the best FM reception, the automobile antenna should be designed like a TV antenna and pointed in the direction of the station. The best antenna is a long piece of wire; the higher the wire, the better the reception. However, because of design necessity, the automobile antenna is restricted in size, height, and direction and must receive both AM and FM stations. This means that a limited amount of the station's signal reaches the vehicle radio chassis.