| Business | Phone |
| Acme Sound Inc 1514 Ne 14th Ave, Portland 97232 | (503) 284-2222 |
| Selectron Inc 7401 Sw Capitol Hwy, Portland 97219 | (503) 245-9988 |
| Electronic Sound Co Po Box 20145, Portland 97294 | (503) 245-9393 |
| Justice Communications Co 3337 Se Hawthorne Blvd, Portland 97214 | (503) 232-6163 |