| Business | Phone |
| Columbia Sound Design 1729 Paris Rd, Columbia 65201 | (573) 256-5244 |
| D & M Sound/Johnston Audio 201 S 8th St, Columbia 65201 | (573) 449-3933 |
| R & R Sales 416 Big Bear Blvd, Columbia 65202 | (573) 443-1967 |
| Midwest Audio Vision 3605 S Providence Rd # 7, Columbia 65203 | (573) 441-1440 |