| Business | Phone |
| Alpine Sound Svc 210 Paine Farm Rd, Duluth 55804 | (218) 348-2595 |
| Audio Systems 326 E Central Entrance, Duluth 55811 | (218) 723-1623 |
| Dads Electronics Sound Syst 4940 Matterhorn Dr, Duluth 55811 | (218) 727-3053 |
| Integrity Loss Prevent Spec 12710 Water St, Duluth 55808 | (218) 626-2520 |