Soundbars, or Sound Projectors, are available in a number of different guises. The main things to look for are: how many channels of sound they support, e.g. 2.1 would just be frontal sound whereas a 5.1 system would mean surround sound; the types of surround sound supported, e.g. Dolby Digital; the supported connectivity; the power output; the pysical size - for wall mounting especially you can buy a soundbar to suit the size of your flat screen television.
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