| Arcor Electronics | Wires |
| Atex Electronics | Electronic Components |
| Audio Electronic Supply | Tube Amplifier Kits and parts |
| Audio Prism | Electronic Components |
| Campaign Audio Design | Cables |
| DIY Cable | Cables |
| Eichmann eXpress | Cables |
| ERAUDIO Co. | Tube Amplifiers |
| Maple Audio Works | Cables |
| Midwest Audio | Tube Amplifiers, Cables |
| NAT - High End Tube Amplification | Tube Amplifiers |
| Parts Connexion | Parts |
| Play Things Of Past | Tubes, Parts |
| Quantum Cable | Cables |
| TAD - The Tube Amp Doctor | Tubes, Parts |
| Tube Amp Doctor GmbH | Tubes |
| Venture Audio System | Tube Amplifiers, Speakers. Cables |
| Venture Audio System | Tube Amplifiers, Speakers. Cables |
| Welborne Labs | Tube Amplifier Kits, Tubes and Parts |
| Wireworld Cables | Cables |