| All Electronics | Electro-Mechanical and Electronic Parts |
| Alpha-Core Inc. | Cables, inductors |
| Audio Consulting | Capacitors, silver wired Transformers |
| Jensen Capacitors | Capacitors |
| Solen | Capacitors, Speakers, Inductors |
| Sonic Craft | Speaker Kits |
| Welborne Labs | Tube Amplifier Kits, Tubes and Parts |