Not everything that you watch (on TV and otherwise) is presented in Dolby Digital 5.1 surround sound. A DVD most likely will
be recorded in this way, giving you discrete sound for the rear channels. Most television programming is available in Dolby Pro
Logic, which doesn’t present a very strong discrete signal to the rear speakers. Another thing to consider is that for most movies
and TV programs the main action is happening in the front and center speakers, with the rear speakers used primarily for sound