Definitions for "Center Channel"
The center channel in a home theater setup is the center speaker designed to replace your television's front speakers for mid to high range dialogue. If you have no center channel, you may be able to use your television's speakers depending on the functionality of your audio receiver.
The center speaker in a home theater setup. It is generally placed immediately above or below a direct-view TV or behind the screen for a front projection TV. Ideally this speaker is placed on a horizontal line with the left and right channel speakers. Location of this speaker is critical as it produces 80% of the sound in a typical movie, including dialog.
The center channel speaker is used to produce the voices and dialogue in surround sound movies. This is commonly referred to as the most important speaker in a home theater system because it produces approximately 80% of all the sound heard in an average movie. In movie theaters, the center channel speakers are placed behind the screen, directly in front of the viewer. In a home setting it is preferable to have the center channel speaker either directly on top of, or directly below, your television. Note: In an ideal situation, your center channel speaker will be the exact same make and model as you right and left front speakers. As the very least it should be the sam brand as your right and left front speakers.
A 6 Mhz (bandwidth) section of broadcasting spectrum allocated for one analog NTSC transmission.