Once you have connected all of the audio and video cables to the surround sound receiver, you will need to run speaker wire to the spots where the speakers are going to go.
The center speaker should go either above or below the television directly in front of you. If you are using a projector I recommend putting the center speaker behind the screen, but make sure you have a screen that does not block sound.
The left and right front speakers should be placed in between 22 and 30 degrees from your listening center (where you will be sitting) on each side.
If you have a 7.1 or 9.1 surround sound system you will need to set up your front height speakers, they should be at the same angle as the front left and right speakers only higher up on your wall, to make the sound seem like it is coming from the ceiling.
The surround sound speakers in the back are placed differently depending on the system you have. If you have a 5.1 channel surround sound system the rear left and right speakers should be placed behind you in between 135 and 150 degrees.
If you have a 7.1 or 9.1 channel system there are four rear speakers to place. The surround right and left speakers should be placed at a 90 degree angle on both sides of you, and the surround back left and right speakers should be placed behind you between 135 and 150 degrees.
The sub-woofer can be place anywhere in the room, if set up properly you should not be able to tell where the sub-woofer is located. The sub-woofer should not produce too much bass to the point where it sounds like there is an earthquake in one corner of your room. For placement ideas here are some things you can try: set it next to the T.V., if it is not giving the sound you want put it up against a wall, if you still need a difference in sound place it in a corner. Each position can give you different levels of bass. Another good idea is to purchase a better sub-woofer cable than the one that came with your system, this will greatly improve the sub-woofers sound.