| Business | Phone |
| Baltimore Sound Engineering 6308 Blair Hill Ln, Baltimore 21209 | (410) 583-8900 |
| Dsl Sound Inc 4201 Odonnell St, Baltimore 21224 | (410) 522-2061 |
| Event One 3101 Washington Blvd # 1, Baltimore 21230 | (410) 644-7314 |
| Flight Three Sound Inc 5007 Ready Ave, Baltimore 21212 | (410) 433-3902 |