| Business | Phone |
| D B Audio Group 10901 Mill Springs Dr, Nevada City 95959 | (530) 265-9415 |
| Paul Emery Audio Production Nevada City 95959 | (530) 478-1974 |
| Sound Idea Productions 417 Nursery St, Nevada City 95959 | (510) 832-5178 |
| Voxosonic 119 Martin St, Nevada City 95959 | (530) 470-9120 |