- Aaron - - Manufacturer of high-end pre-amplifiers, stereo and three channels amplifiers. Germany.
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- Anacon Technology - - Manufacturer of high-end custom tube guitar amplifiers where proprietary circuits offer full control of distortion and it's harmonic spectrum. Sweden.
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- Aria Audio - - Manufacturer of tube/transistor hybrid amplifiers.
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- Art Audio - - Tube pre and power amplifiers. Stereo and mono blocks.
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- Artec France - - Manufacturer of high end solid-state amplifiers and pre-amplifiers. France.
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- ASV Tube Audio - - Slovenian manufacturer and supplier of tube amps, kits and components.
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- ATI - Amplifier Technologies Inc. - - Manufacturers of preamp/processor, stereo, multi channel and distribution amplifiers utilizing differential drive amplifier technology.
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- Audible Illusions - - Manufacturers of tube equipment including the Modulus 3A Pre-Amp.
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- Audio - - Makes single-ended power amplifiers consist of triode and pentode type valves, valves pre-amplifiers, kits and components.
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- Audio Valve - - Manufacturer of high end tube and valve amplifer. Germany.
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- Audire - - California manufacturer of power amplifier, preamp and the monoblock New Monarch amplifier.
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- Beam-Echo - - British tube amps with retro styling.
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- Beard Audio - - Reviews, brochures and information about tube amplifiers and pre-amplifiers.
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- Border Patrol - - Manufacturer of valves amplifiers with a wooden finish and power supplies.
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- Boulder - - Colorado manufacturer of stereo and mono amplifier, DAC and phono preamplifier.
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- Burning Blue Audio - - Manufacturer of portable USB headphone amplifiers and desktop amps for digital and computer audio. Dedicated to headphone amplification.
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- BWS Tube - - Manufacturer from Virginia of hand crafted, broadcast grade and stereo tube equipment.
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- Centasound - - Tube multimedia and integrated amplifiers and digital signal processor (DSP).
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- Chapter Audio - - British manufacturer of one power amplifier and one pre-amplifier.
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- Coda Technologies - - FET line stages and phono preamplifiers and bias class A power and integrated amplifiers such as Unison integrated amplifier.
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- Conrad-Johnson - - Wide range of (mostly tubed) amplifiers and preamplifiers.
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- darTZeel - - Makes a power amplifier and preamplifier. Switzerland. [English, French.
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- D2Audio - - Makes intelligent digital amplifier modules for the audio industry. USA.
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- Desperate Audio Magnetics - - Manufacturer of vacuum tube audio amplifier transformers, output, input, interstage as well as plate and power chokes and power transformers. USA.
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- DPF audio - - Manufacturer of Mosfet and tubes hi-fi audio equipments and prototypes.
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- Dynavector - - Manufacturer of phono, power, and pre-amplifiers. Australia.
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- Edge Electronics - - Power, multi-channels, integrated amplifiers, pre-amplifiers using the proprietary Laser Optical Bias Circuitry technology.
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- Embla Audio - - Monoblocks and conventional stereo amplifiers.
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- Emotive Audio - - Tube amplifiers and preamplifiers such as The Epifania preamplifier.
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- Ex.Field - - Vacuum tube amplifiers from Japan.
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- Golden Middle - - Makes tubes amplifiers, preamplifiers, vacuum tubes components, sockets and transformers. Based in Saint-Petersburg, Russia.
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- Graaf - - Tube power, integrated amplifiers and pre-amplifiers based in Italy.
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- Greenstone - - Manufacturer and distributor of vacuum tubes and vacuum capacitors.
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- Halcro Amplifiers - - Manufacturers of mono, power, integrated, and pre amplifiers for stereo reproduction and home theater.
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- icon Audio - - Makes hand made high end valve amplifiers. Leicester, UK.
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- IRD Audio - - Thailand manufacturer of power, monoblock and integrated amplifiers and pre-amplifiers.
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- Jeff Rowland Design Group - - High end manufacturer of stereo, monoblock, integrated amplifier and pre-amplifier, phono pre-amplifier power supplies such as Synergy, Cadence and Concentra products line.
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- Juicy Music Audio - - Designs, manufactures and markets vacuum tube amplifiers and preamplifiers. Online order. USA.
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- Korato - - Manufacturers of tube and solid state amplifiers and pre-amplifiers. Based in Belgrade, Serbia.
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- Kwang Woo - - Tube integrated amplifier, phono equalizer, power amplifier and pre-amplifier.
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- L C Audio Technology - - Manufacturers of power amplifiers that use pulse amplifier module and makes also cables.
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- Labtek - - Italian manufacturer of tube amplifiers, preamplifiers and accessories.
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- Lamm Industries - - High end tube and solid state amplifiers and pre-amplifiers such as Monaural power amplifier.
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- Leben Hi-Fi - - Hi-fi tube amplifiers manufactured in Japan.
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- Linar Audio - - Quebec amplifier manufacturer for audiophile.
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- Mactone - - Electron tubed amplifiers and pre-emplifiers maker from Japan.
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- Mapletree Audio Design - - Manufacturers of stereo and multi-channel tube audio amplifiers, line pre-amplifiers, headphone/phono amplifiers and line router.
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- Mapletree Audio Design - - Tubes amplifiers and pre-amplifiers designed and hand crafted by Dr. Lloyd Peppard, a retired electronics engineering professor.
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- Marchand Electronics Inc. - - Manufacturers of equipment such as electronic crossover networks, both solid state and vacuum tube and modular audio amplifiers.
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- Marsh Sound Design - - Manufacturer of home theater processors, multi channels, stereo, power amplifiers and pre-amplifiers with a distinctive design.
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- McAlister Audio - - Specializing in vacuum tube amplifiers. Custom design and build high end audio amplifiers. Repairs and restoration. Canada.
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- ME Sound - - Amplifiers and pre-amplifiers that integrate zero loop feedback and near constant operating temperature technologies.
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- Monolithic Sound - - Passive and active pre-amplifier, phono pre-amplifier, dual mono and digital/analog power supply and "perpetual power plant" power supply.
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- Music Reference - - Tube power amplifier and preamplifiers, tubes parts and interconnects.
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- NAT - Nikic Audio Team - - Single-ended triode, low- or no-feedback amplifiers and preamplifiers. Hand-wound transformers.
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- NeoFidelity - - Korea manufacturer specializes in digital audio signal processing such as digital power amplification, surround and DSP programming.
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- Octave - - German manufacturer of integrated, power and monoblock amplifiers such as Jubilee line, pre-amplifiers and outboard power supply upgrade.
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- Olionik - - Swedish manufacturer of vacuum tube amplifier.
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- Omak - - Ukraine manufacturers of valve amplifiers, audio transformers, pre-amplifier and passive pre-amplifiers.
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- One Electron - - Manufacturer of audio transformers and amplifiers.
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- Opera Audio - - Manufacturers of vacuum tubes single-ended class A amplifiers.
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- Pacific Creek - - Manufacturer and distributor of vacuum tube audio amplifiers. USA.
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- Pathos - - Manufacturer of valve integrated and monoblock amplifier.
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- Placette Audio - - Preamps from Idaho built around heroically engineered volume controls.
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- Plinius Audio - - New Zealand manufacturer of Odeon amplifier, pre-amplifier, integrated and Jarrah phono amplifier.
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- Power Modules - - Power amplifiers, phono and vacuum tube pre-amplifiers from David Belles.
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- Reflection Audio Design - - Manufacturer of the OM1-Quantum pre-amplifier, amplifiers, AC4 power supply and DC12 battery power supply from Stephen Balliet.
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- RobyattAudio - - Manufacturer of tube amplifiers, preamplifiers and loudspeaker.
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- Rogue Audio - - Vacuum tube audio amplifiers and preamplifiers. Provides reviews, news and retailers.
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- Sakuma System - - An association for audiophiles and manufacture of hand made vacuum tube amplifiers. Japan.
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- Shindo Laboratory - - Japan manufacturer of tube amplifiers such as Petrus III and stereo pre amplifier Monbrison.
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- Sun Audio - - Japan manufacturer of valve amplifiers kit that can be assembled.
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- Talisman Audio - - High-end small manufacturer of one line of product: power and monoblock amplifier, preamplifier and headphone amplifiers.
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- Tenor Audio - - Quebec high-end tube amplifiers with a wooden finish.
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- Thylenea - - Design a range of amplifiers and pre-amplifiers. France.
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- Transcendent Sound - - Manufacturer of tube amplifiers, DIY audio kit, audio projects, and preamplifiers. Provides forum and product informations.
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- Tron Audio - - Manufacturer of high end tube amplifiers and preamplifiers. Also makes loudspeakers. Swiss.
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- TruVibe - - Manufacturer of custom valve guitar amplification. UK.
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- Unison Research - - Italian manufacturer of tube amplifiers with a wooden design and Unico hybrid integrated amplifiers product line.
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- Vacuum Tube Logic - - Consumer and professional tube power and integrated amplifiers and preamplifiers. Provides products information and support.
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- Vintone Circuits - - Designer and builder of custom guitar amplifiers and speakers housed in exotic hardwood cabinets.
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- Vitus Audio - - High End Audio products: Amplifier, phonostages, linestages and powerstages.
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- Viva Audio - - Itilian manufacturer of single ended directly heated triode valves operating in pure class A employing zero negative feedback amplifier and pre-amplifiers.
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- Vivaaudio - - Manufacturers of home audio amplifiers and preamplifiers.
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- Welborne Labs - - Tube amplifiers, preamplifiers, line filters, interconnects and cables. Provides tech support, news and forum.
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- World Tube Audio - - Manufacturer of tube amplifiers and loudspeaker kits such as parts, tubes, transformers, and circuit boards. Austria.
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- Wright Sound Company - - Tube point-to-point and hand-wired amplifiers and pre-amplifiers from Washington.
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- YS-Audio - - Manufacturer of tube amplifiers and pre-amplifiers. Hong Kong, China.
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