What are the factors for a home theater

There are two things that people usually care for when it comes to quality in a Desktop with noticeable qualities. They are the video and audio. Apart from the computing capacities of a PC, these two factors stand out to provide exterior view to a system. In the video part it is the graphics card and display devices with some drivers take their part. While in the audio part it is the speaker basically.
Setting up a home theater needs some basic reasons for which it is going to be installed and it also have factors that determine its quality and effectiveness? Some of the reasons why a proper speaker system is needed are maybe for gaming or digital home theater. For either of these reasons the factors are same but have varying values for each. The factors are frequency, area of coverage, power, and control provided. The amount of quality of a product also depends on the prize to be rendered for it.