| AKG ACOUSTICS | Tube Microphones, Headphones |
| Andy Lawrence Microphones | Tube Microphones |
| APEX Electronics | Tube Microphones |
| Audio-Technica | Tube Microphones |
| B.L.U.E. | Tube Microphones |
| Baltic Latvian Universal Electronics | Microphones |
| CAD Microphones | Microphones |
| Dirk Brauner | Tube Microphones |
| First Quality Musical Supplies | Link Lists, Tube Microphones |
| Georg Neumann GmbH | Tube Microphones |
| Horchaudio | Tube Microphones |
| Lawson Microphones--Relive the Magic | Tube Microphones |
| Marshal Electronics, Inc. | Connectors, Cables, Tube Microphones |
| MXL Mics | Tube Microphones |
| Neumann USA Microphones | Microphones |
| Rodemicrophones Gateway | Tube Microphones |
| RTT Microphones | Tube Microphones |
| Soundelux Entertainment Group | Tube Microphones |
| Supersonic Comm. | Tube Microphones, Repair, Service |
| The New JT30 Page | Tube Microphones, Museums |
| Vintage Broadcast Microphones | Tube Microphones |