- J'adore Adorn
- J. E. Schum
- JABEES
- Jabra
- Jackson
- Jacquard
- Jadis
- Jaeger
- Jago
- Jam
- Jamba!
- JAMES LOUDSPEAKER
- Jamo
- Jarre
- Jawbone
- JAXMOTECH
- Jay-Tech
- Jaybird
- Jays
- Jaytec
- Jaz
- jazwares
- Jazz
- JB.LAB
- JBC
- JBL
- Jb System
- Jean
- Jeckl.Float
- JEHNERT
- Jeiko
- Jensen
- Jens Of Sweden
- JES Collection
- Jet-Computer
- JET.A
- Jetsound
- Jeu Hans