If you have a high-definition television, an HD cable receiver box will improve the picture for many television stations. It’s also possible for you to improve the audio generated by your system if you have surround sound speakers, a receiver and the proper cable. Surround sound systems will typically come with 5.1 digital audio capability, though some come with 6.1 or 7.1. Whatever the capability of your system, introducing surround sound to your home theater will enhance your viewing experience. Writer Bio

How do I Wire Surround Sound to an HD Cable Box  - 7