Radio: Speaker Set - Dual Voice Coil Front mount 64-76FSince at least 2 speakers (channels) are normally required for stereo radios, Custom Autosound have developed a specialized DUAL speaker system for classic vehicles that originally only ever came out with one mono speaker.. all contained in the mono housing. These dual voice coil "DVC" speakers will give you the best possible sound from your original speaker location. DVC speakers have up to 70% more cone area than the conventional dual speaker