| Business | Phone |
| Any Event Sound Systems Grand Rapids 49503 | (616) 451-8195 |
| Central Interconnect Inc 1425 Coit Ave Ne, Grand Rapids 49505 | (616) 458-2999 |
| Customusic Service Co 6540 Division Ave S, Grand Rapids 49548 | (616) 455-0080 |
| Telesound Inc 862 Purchase Dr Ne, Grand Rapids 49525 | (616) 361-0019 |
| Soundstructure 403 44th St Sw, Grand Rapids 49548 | (616) 776-0520 |
| Rit Audio 3815 Division Ave S, Grand Rapids 49548 | (616) 243-7867 |
| P J's Sound & Backline 815 Coldbrook St Ne, Grand Rapids 49503 | (616) 459-0211 |