deltaplex arena & conference center (formerly grand rapids stadium, stadium arena, and turner arena) is a 5,000-seat multipurpose arena in walker, michigan, united states. it is the home of the grand rapids drive of the nba g league. it was built in 1952 and since then the deltaplex sports, entertainment and convention complex has grown around the arena. the arena is a space, which has a ceiling, seats up to 8,000 for concerts and has 1,088 loge seats. it has a 60-by-56-foot portable stage. deltaplex arena is a venue usable for not only sports and concerts but also trade shows, conventions, concerts and special events.