Dual-voice coil speakers provide inexpensive, "full 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). These dual terminals, in combination with the twin angled dome tweeters and 5 1/4" woofer included in our M-SR5D, provide amazing stereo performance, especially for the low-budget price!