| All Electronics | Electro-Mechanical and Electronic Parts |
| Ampshop | Enclosures, Tube Amplifier Services |
| Angela Instruments | Parts, Speakers, Tubes |
| Antique Electronic Supply | Attenuators, Books, Capacitors, Enclosures, Guitar Parts, Knobs, Manuals, Potentiometers, Resisitors, Tubes, Tube Boxes, Tube Sockets, Speakers,Tools, Transformers, Wires |
| Apparatebau Lück, Wipperfürth | Enclosures |
| Design Build Listen - DIY HiFi Components & Kits | Cabinets & Hardware, Knobs, Connectors |
| Experience Electronics | Tube Amplifier Kits, Parts, Transformers |
| Hammond Mfg. Co. (Electronics Group) | Racks, Transformers, Power Bars |
| Handmade Electronics | Tubes and Parts |
| Hinkel-Elektronik | Parts |
| IGA Valves Bilbao | Tube Seller |
| Oh's Audio | Tube Amplifiers, Tube Amplifiers Kits, Forum, Parts |
| Par-Metal Products Inc. | Chassis |
| RS - Components | Parts |
| Schuro - Elektronik | Parts |
| Sescom | Parts, Transformers, Enclosures |
| Soriaudio | Forums, Links, Enclosures, Transformers |
| Sultone Amp Cabinets | Cabinets & Hardware |
| TAD - The Tube Amp Doctor | Tubes, Parts |
| Tube Amp Doctor GmbH | Tubes |
| Welborne Labs | Tube Amplifier Kits, Tubes and Parts |
| Woodcab | Cabinets & Hardware |