Aguilar Amplifiers: Makers of handmade bass amps.
Aiken Amplification: Manufacturer of tube guitar amps and attenuaters. In-depth technical database.
Amp Tone: Information about distortion voicing, effects placement, and cranked-tube-amp tone at any volume.
Cornford Amplification: UK maker of valve guitar amplifiers. Includes sound samples [requires Flash 5].
Crate Amps: Company background information and product overviews, as well as a dealer list, and a support section containing FAQs, and downloadable manuals. Also features a list of users and the gear they selected.
Dave Hall: Custom and standard hand built valve guitar amplifiers manufactured using traditional methods.
Demeter Amplification: Products listed by category and includes: pro audio, guitar, bass, and accessories sections with detailed specifications and cabinet descriptions. Company history and contact information are also available as well as an artist list.
Dr Z Amplifiers: Professional quality amps with sound clips and reviews.
Eden Electronics: Bass amplification products.
Electrosonic Amplifiers: Builds custom all-tube guitar amplifiers. Information about products and services to musicians.
Euphonic Audio: High end bass cabinets and combo amps.
Flat Stone Amplifiers: Manufactures custom, hand-built tube guitar amplifiers. Includes specifications, company history, and contact details.
Gallien-Krueger: Bass cabinets, heads, combos, and accessories.
Garnet Guitar Amplifiers: Facts, photos, specs and details of Garnet amps, as well as a serial number registry.
Gerhart Amplification: Handmade tube guitar amps and kits.
Hiwatt Amplification: Model and tech information, catalog, and dealers.
Hoffman Amplifiers: Tube amp parts, tube amplifier building supplies, books/videos about tube amps.
Hughes and Kettner: Product specifications and detailed descriptions, as well as an image gallery. Also features an artist list, dealer information, and downloadable user manuals. Available in English and Dutch.
Juke Amplification: Hand-built vacuum tube amps. Models, specifications, purchase information.
Kendrick Amplifiers: Manufacturer of tube amps, guitars, and related accessories. Parts, repairs and restoration of vintage tube amps. Site features a demo room with MP3 clips, a company history section, and ordering information.
Kustom: Guitar and bass amplifiers, as well as P.A. systems, stage monitors, microphones, and speakers.
L.R. Baggs: Manufacturer of advanced pickups and electronics for guitar and other stringed instruments. Includes product details, manuals, and reviews.
Laney: UK manufacturer of guitar and bass amplifiers. [requires Flash]
Line 6: Digital guitar amps and equipment.
Marshall Amplification: Product images and specifications, information on 'rock kits' as well as free instructional material and desktop themes. Also contains a player feedback section, handbooks for download, and an archive of past products.
Marshall Arts: User-maintained site including information on past and current Marshall amplifiers, speaker cabinets and accessories. User-submitted photos of Marshall equipment and FAQs.
Matamp Amplifiers: Green Amps: tube and valve amplifiers from the original manufacturer of Orange Guitar and Bass amps.
Mesa Boogie: Manufacturers located in Petaluma, California. Features a tour through the construction process, a dealer list, and a new product release section.
Metaltronix Amplifiers: Information on Metaltronix amplifiers including manuals, settings, schematics, history, ads, and message board.
Naylor Amps: Product features and details pertaining to tone and response. Also contains speakers and padded covers, a distributor list, and contact information.
Plexi Palace: Vintage guitar amplifier sales and service. Apple Valley, California.
Roccaforte Amps: Custom, hand-built tube guitar amplifiers. EL34 tubes, English transformes, turret board construction. Amp prototypes, repairs and modifications.
Rockman: An enthusiast's appreciation of Rockman guitar gear.
Rocktron: Manufacturer of amplification and effects technology; includes product details, dealer listing and technical support.
Singlecoil.com: A library of do-it-yourself projects to modify stompboxes and effects, amps and guitars; includes a components shop.
Soldano Custom Amplification: Information regarding reverbs, heads, preamps, and special effect equipment as well as a list of retails and famous users. Also features a FAQ section and contact information.
Tone King Amplifier Company: Manufacturer of vacuum-tube guitar amplifiers.
Torres Valve Amplifiers: Custom built tube amps, amplifier kits, and parts. Includes information on building and modding your amp.
Totally Humungus Productions: Maker of guitar pedals and preamps, including Scott's Crispy Cream Treble Booster.
Trance Audio, Inc.: Amplification systems for acoustic guitar. Product information; downloadable .pdf manuals.
Victoria Amp Company: Detailed descriptions of the various models offered as well as the components used. Also contains a dealers list by state and links to parts suppliers and reference material.
Z.Vex Effects: Manufacturer of amplifiers and effects pedals; includes product details, manuals, sound samples and ordering instructions.