Aaron (users.aol.com/aaronhifi/home.htm)
HT Products: High-End Amplifiers, Pre-Amps, and Phono Amps

Acarian (Alon) (www.AlonByAcarian.com/)
HT Products: Speakers and Subwoofers

ACI (www.audioc.com)
HT Products: Speakers, Subwoofers, Stands and Accessories

Acoustic Innovations (www.AcousticInnovations.com)
HT Products: Complete Room Acoustic Design, Acoustic Panels, Theater style drapes and seating, Poster Frames, and Movie Posters

Acurus (Klipsh Mondial) (www.mondialdesigns.com/)
HT Products: Amplifiers and Surround Processors

Adcom (www.adcom.com)
HT Products: Amplifiers, Pre-Amps, Tuner/Pre-Amps, High-end CD Players, Surge Suppressors, Dolby Digital Surround Decoder, and Accessories

Aerial Acoustics (www.aerialacoustics.com)
HT Products: Speakers and Subwoofers

Aiwa (www.aiwa.com)
HT Products: Mini-Theater Systems, Complete Home Theater Systems, DVD Players, TVs, and VCRs

ALR-Jordan (www.alr.de)
HT Products: Speakers

Ambiance Acoustics (www.calcube.com)
HT Products: Cube Speakers

AMX (www.amx.com)
HT Products: Home Theater Control Systems

AR - Acoustic Research (www.acoustic-research.com)
HT Products: Speakers and Subwoofers

Klipsh Mondial Aragon (http://www.mondialdesigns.com/index.htm)
HT Products: Amplifiers and Pre-Amps

Arcam (http://www.arcam.co.uk)
HT Products: Integrated Amplifiers, Amplifiers, CD Players, and Tuners

ASC (www.tubetrap.com)
HT Products: Home Theater Acoustic Treatments

Atlantic Technology (www.atlantictechnology.com)
HT Products: Speakers and Subwoofers

Atma-Sphere (www.atma-sphere.com)
HT Products: Amplifiers and Pre-Amps

Audio Control (www.audiocontrol.com)
HT Products: Equalizers, Anylizers, and Crossovers

Audion (www.hi-fidelity.co.uk/audion/)
HT Products: Amplifiers and Pre-Amps

Audio Power (www.audiopower.com)
HT Products: AC Power Conditioners

Audio Research (www.audioresearch.com)
HT Products: Amplifiers, Pre-Amps, Vacuum Tube Amps, and Phono Amps

Audio Synthesis (www.tassie.net.au/~cdaly/index.htm)
HT Products: Pre-Amps, D/A Converters, Cables, and CD players

Audire (www.audire.com)
HT Products: Amplifiers and Pre-Amps

Avalon Acoustics (www.avalonacoustics.com)
HT Products: Speakers

Ayre Acoustics (www.ayre.com)
HT Products: Amplifiers, DVD/CD Players, and Pre-Amps