For more than four decades, this two-mile oval has hosted countless historic races, its Victory Circle graced by such famous names as Richard Petty, A.J. Foyt, Mario Andretti, Parnelli Jones and Dale Earnhardt. Today, MIS seats more than 119,500 and is still one of the nation's premier racing venues, thanks in no small part to an ongoing program of improvements and upgrades over the years.
Most recently, the track's original sound system was completely revamped, its 1960s-vintage horns replaced with more than 200 Community R-Series weather-resistant loudspeakers.
The grandstand seating is covered by 77 Biamp Community R2-94Z loudspeakers and 59 R.5 loudspeakers with 90x40 and 90x90 degree coverage patterns. Turns three and four received another 40 R.5HPT systems, while the fan walk areas were provided 10 R2-94Z loudspeakers. Out at the entrance gates, 16 R.25-94TZ loudspeakers welcome the fans.