Assuming you’ve opted to buy speakers from the same manufacturer for every channel in your home theatre system, a fundamental requirement for great sound, the next important thing is to position the speakers correctly in your room.
The ITU (International Telecommunications Union) standard for multichannel recording and playback is one recommended standard for speaker placement, often employed by studio engineers when mixing surround audio for both movie and music use, and as a broad guideline, it’s effective. However, the ITU stipulations can be impractical for many homes. For example, it demands identical speakers be used in each channel, including the centre channel, which is difficult to do if your system has floorstanding speakers for left and right front channels.
Secondly, place your centre speaker at the same height as the main left and right speakers, under the screen if possible. Try to align its tweeter with those on the other front speakers in your system, or if that’s not possible, use a laser pointer and align its angle of tilt so that it focuses on to the same position on your seat as your other speakers. This can be extremely effective, and is easily achieved with a simple tilting centre-speaker stand such as the one we make. Further centre-speaker tweaking will help focus your system’s soundfield. If you imagine a shallow, curved arc that runs through the plane of your main left and right speakers, the centre speaker needs to be placed at its apex, so that it sits right at the heart of the stereo image generated by your main speakers, and slightly behind them. It should also be placed equidistant between the two, or as close as it is practicably possible to be.