Surround sound stereo systems, when the program being played has the proper digital coding, will separate the audio track into four, five, and sometimes six different channels. You will need your front and rear (surround) speakers, your subwoofer, and a center channel speaker that reproduces the singing in properly encoded songs, and the actor’s dialogue in movies. There are a number of car surround systems on the market, but a few stand out from the rest. The Kicker SRT system is one of the best available. Dynaudio teamed with Dolby Labs to fine tune their speakers and obtain an optimal surround feature set. The Bose 5.1 Cabin Surround System comes from one of the premier innovators in the audio industry.
For more info, see Eight Tips For Getting The Best Car Speaker System