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