- Advanced Sound & Image-ASI
- Audio & Video Specialists Inc
- Audiotek
- Chapman Cooper & Assoc
- Chapman Cooper & Assoc
- Clear Presence Audio
- Flag Sound Systems Inc
- Flag Sound Systems Inc
- FNA Inc
- FNA Inc
- General Communications Corp
- Hughes Sound Engineering
- L A Sound Co
- Michael Garrison Assoc
- Mount Shasta Electronic Svc
- Muse Productions
- Novo Group
- Sacramento Production Svc
- San Diego Sound & Music Repair
- San Francisco Audio
- Solstice Co
- Sonic Perfection Sound System
- Sound Consulting
- Sound Dimensions
- Sound Technology Consultants
- Sounds Natural Audio Svc
- West Coast Sound
