Audio manufacturers
- 1010music
- 2 Many Synths
- 2box
- 4ms
- 510k Arts
- AAS
- Ableton
- Accentize
- Accu Stand
- ACE Studio
- Acid Rain Technology
- Aclam
- Acon Digital
- Acus
- ADAM Audio
- Adamas
- Adams
- ADDAC
- Adelsklang
- AEA
- AER
- afk-audio
- Aguilar
- AIAIAI
- Aim Audio
- AIR Music Technology
- Airturn
- AJH Synth
- AKAI Professional
- AKG
- Albrecht
- Alesis
- Alexander Pedals
- Alfred Stingl by Höfner
- Alhambra
- Allen & Heath
- Allpedal
- Alto
- Altus
- Amalio Burguet
- Amaran
- Amati
- Ambient
- American Audio
- Ampeg
- Ampetronic
- Ample Sound
- AMS
- Andrea Varazzani
- Angel Lopez
- Antares
- Antelope
- Antoine Courtois
- Anton Stöhr & Sohn
- API Audio
- Apogee
- Applause
- Appsys
- AR Resonance
- Arobas Music
- ARP
- ART
- Art & Lutherie
- Artec
- Artino
- Artinoise
- ARTonic Music
- Arturia
- ASM
- Asparion
- Aston Microphones
- ATEC
- Audeze
- Audible Genius
- Audient
- Audio Sprockets
- Audio-Technica
- Audiocube
- Audiomodern
- Audiosigma
- AudioSourceRE
- audioström
- Audiowerkzeug
- Audix
- Audota
- Auralex Acoustics
- Auratone
- Austrian Audio
- Avalon
- Avantone
- Avid
- Axxent
- Azumi
- B&S
- Baby Audio
- Bach
- Bad Cat
- Barefoot Sound
- Barn3
- Bartolini