Dual-voice coil speakers provide inexpensive, two channel stereo sound from one single speaker. They are a great choice for those on a low budget, or those who prefer only one speaker in a smaller area (ex. hallway, bathroom, closet, etc.). Each dual voice coil speaker has two inputs (one for the left channel, and one for the right channel of an amplifier). BIC America dual voice coil in-ceiling speakers are not suitable for one channel use.