The United Center, which is owned by Rocky Wirtz and Reinsdorf, covers 960,000 square feet (89,187 m²) and is located on a 46-acre (19 ha) parcel, west of the Chicago Loop. The arena claims to be the largest in the United States in physical size, though not in capacity. Its exterior bears a striking resemblance to that of Chicago Stadium. It seats 20,500 for hockey, 22,220 for basketball and up to 23,500 for concerts. It hosts over 200 events per year and has drawn over 20 million visitors since its opening.
United Center's acoustics were designed to amplify the noise level in order to recreate "The Roar"--the din of noise that made Chicago Stadium famous, especially during hockey games. During hockey season, an Allen Organ that is a replica of the old arena's famous Barton organ is used; recreating the old organ's notes took two years.
