| Audio Innovations 500 | Museum, Private Tube Audio Sites |
| Audio Nirvana Ernest Ruiz's Audio Page | Vintage Audio |
| be.audiophil | Private Tube Audio Sites |
| Hanazawa's Junk Page | Vintage Audio |
| John Harper | Private Tube Audio Sites |
| jyk listening room | Private Tube Audio Sites |
| RobyattAudio | Private Tube Audio Sites |
| Röhrenfieber | Private Tube Audio Sites |
| Rör & vinyl | Private Tube Audio Sites |
| site Jeen | Private Tube Audio Sites |
| Studio K | Private Tube Audio Sites |
| The Joy of Vacuum Tubes | Personal Tube Audio Site, Links, Tube Radios |
| tubeamp | Private Tube Audio Sites |
| Yvo's HIFI pictures page | Quad |