According to the Best Buy Web-Site under Product Specifications the following are the dimensions:
Dimension
Product Height 2.3 inches
Product Width 38.6 inches
Product Depth 4.1 inches
Product Weight 7.5 pounds
Subwoofer Height 13.9 inches
Subwoofer Width 8.1 inches
Subwoofer Depth 11.9 inches
Subwoofer Weight 13.7 pounds