- AV Now - Sales and service of audio products and accessories.
- AVHIFI - Featuring specialty audio and video products such as home theater components and home audio amplifiers and electronics.
- Absolute Sonos - Sells wireless audio equipment.
- Acorn Designs - Offers a variety of theater and concert sound products.
- AcousticSoundDesign - Sells stereo and home theater speakers and electronics, power conditioners, wires and cables.
- Add a CD Changer - Offers CD, MP3 and mini disc chargers for cars and portable devices and accessories.
- Adler Audio - Offers performance parts, radar detectors, home audio, dj equipment and car audio.
- AmpCity UK - Sells headphone amplifiers and DAC's, and serves UK and EU based customers.
- AmrMart - Offers audio and video products such as loudspeakers, MP3 players, and accessories.
- Anchor Audio Club - Sells Anchor Audio sound systems, portable sound systems, and P.A. systems.
- Anchor Audio Warehouse - Provides Anchor Audio, public address systems, sound systems, portable sound systems, speakers and accessories.
- AppleSoundShop - Selection of audio equipment for home, school, church or workplace.
- Astounded - Retailer of PA audio systems, karaoke systems, speakers and amplifiers.
- Audio Advisor - Offer audio components and information for audiophiles.
- Audio Basics Inc. - Offers a selection of products such as home audio electrionics, and accessories, vinyl LP records, and Blu-ray software.