Integrated Amplifier
- Accuphase
- Akai
- Audio Agile
- Audionet
- AVM
- BASF
- Camtech
- Cayin
- Creek
- Cyrus
- Denon
- Densen
- Diora
- Dual
- Dussun
- Einstein
- Exposure
- Grundig
- harman/kardon
- JVC
- Kenwood
- Linn
- Luxman
- Marantz
- Mark Levinson
- Metz
- Myryad
- NAD
- Naim
- Nakamichi
- Nikko
- Onkyo
- Optonica
- Phonosophie
- Pioneer
- Revox
- Rotel
- Sansui
- Scott
- Sony
- Teac
- Technics
- Telefunken
- Toshiba
- Vincent
- Wega
- Yamaha
- Thorens