| Business | Phone |
| Bang & Olufsen 1471 Saint Louis Galleria, St Louis 63117 | (314) 727-5400 |
| World Electronics 1408 N Kingshighway Blvd # 101, St Louis 63113 | (314) 361-7088 |
| Theater By Design St Louis 63108 | (314) 550-3750 |
| Signal Seekers 1230 S Elm Ave, St Louis 63119 | (314) 918-0778 |
| National System 1608 Menard St, St Louis 63104 | (314) 621-1919 |
| Music For Pleasure 7475 Big Bend Blvd, St Louis 63119 | (314) 961-5747 |
| Mobile Installation St Louis 63119 | (314) 961-6277 |
| I-Set Up St Louis 63143 | (314) 322-9567 |