| B.L.U.E. | Tube Microphones |
| B1uesboy Amplifiers | Tube Guitar Amplifiers |
| Baco | Tubes |
| Balanced Audio Technology | Tube Amplifiers, CD-Players |
| Balladaudio | Tube Amplifiers, Tube CD Player |
| Baltic Latvian Universal Electronics | Microphones |
| Bandor | Speakers |
| Bartolomeo Aloia | Tube Amplifier Kits |
| Bartolucci Transformers | Transformers |
| Bass Northwest | Retailer |
| BassLab | Tubes |
| Bastanis - Highendsysteme | Tube Amplifiers, Speakers, Cables |
| Bavo Dekker | Vintage Tube Audio Equipment, Articles |
| BC ACOUSTIQUE - Speakers | Speakers |
| be.audiophil | Private Tube Audio Sites |
| Beam-Echo | Tube Amplifiers |
| BEAR Labs | Tube Amplifiers |
| Beardaudio | Beard Tube Amplifier service and support |
| Beau Interconnect | Connectors, Terminal Strips |
| Beauhorn Loudspeakers | Fullrange Lowther equipped speakers, Tube Amplifiers |
| Bedini Electronics | Tube Amplifiers |
| Behringer International GmbH | Professional Tube Studio Equipment |
| Belden Electronics & Communications | Cables |
| Bellari - Professional Tube Sound Equipment | Professional Tube Electronics |
| Bent Audio | Tube Preamplifiers, Attenuators & Potentiometers |
| Bequaert old books | Book |
| Bernd Kuhlmann | Tubes |
| Berning | Tube Amplifiers |
| Bertech-Kelex | Electronic Components and Solder Products |
| Bertrand Audio Imports | Retailer |
| Better Guitar | Links |
| Bext Corporation | Radio & Television Transmitters |
| Beyma | Speakers |
| Big Cookie's Tube Amp Parts and Repair | Tubes, Tube Guitar Amplifiers, Service |
| Billington Valves and Tubes of Billingshurst | Tubes |
| Bill's Ham Radio | Tube Database, Manuals |
| Bill's Ham Radio | Tube Database, Manuals, mirror link |
| Bitco Electronics | Custom build Pro Tube Audioamplifiers |
| Black Art Audio | Transformers |
| Black Forest Audio | Retailer |
| Black Gate | Capacitors |
| Blue Circle Audio Inc. | Tube Amplifiers |
| Blue Glow In Tubes | Article |
| Blues Mobile | Information about 6L6 GC VACUUM TUBES |
| Bob's Antique Radios | Tube Radios & Related Vintage Items |
| Bob's Home Page | Links |
| Bolt 60 | Tube Guitar Amplifiers |
| Bonn Elektronik GmbH | Broadband RF Power Amplifiers |
| Boozhound Laboratories | Articles, DIY Tube Amplifiers |
| Borbely Audio | Tube Amplifier Kits, Tubes |
| BorderPatrol | Tube Amplifiers, PSU's |
| Bottlehead Bulletin Board | Forum |
| Bottlehead.com | Kits, Parts, Information |
| Bound for Sound | Audio Report, Reviews |
| Brent Jessee Recording | Tube Database, Tubes, Old Radios |
| Brentworth Sound Lab | Speakers |
| Brian Smith's Wireless Workshop | Vintage Radios |
| Brinkmann Audio | Tube Preamplifiers |
| British Audio Journal | Online Magazine |
| British Audio Products Online | Tubes, Books |
| Broadcast Sofrate | Tube Electronics for Professionals |
| Broadcasting From The Home! | Ham Radio |
| Brocksieper | Tube Amplifiers |
| Brummers illustrierte Seiten | Tube Radios & Related Vintage Items |
| Brunetti by Salwender | Tube Guitar Amplifiers |
| Bry's Amateur Radio Links by G3XLQ - AF4K! | Links |
| BTB Elektronik - Vertriebs GmbH | Tubes |
| Budda Amps Home Page | Tube Guitar Amplifiers |
| Buddy's Tube Amp Page | Forum, Chat |
| Building Your Own Tube Amp | DIY Tube Audio Site |
| Bulldog Amplification | Tube Guitar Amplifiers |
| Bürklin - Die ganze Elektronik | Tubes, Parts |
| Butler Audio's Latest Amp For Your Car! == TUBE DRIVER BLUE == | Car Tube Hybrid Amplifiers |
| BWS Tube - Purist Audio Reproduction | Manufacturer of hand crafted Tube Amplifiers |