Integrated Amplifier
- Aaron
- Accuphase
- Akai
- AMC
- ASR Audio Systeme Friedrich Schäfer
- Audio Agile
- Audio Research
- Audionet
- AVM
- Ayre
- BASF
- Braun
- Brinkmann
- Burmester
- Cambridge Audio
- Camtech
- Cayin
- Classé
- Copland
- Creek
- Crown
- Cybernet
- Cyrus
- Denon
- Densen
- Diora
- Dual
- Dussun
- Eagle
- Einstein
- Exposure
- Fisher
- Grundig
- harman/kardon
- Hitachi
- ITT
- JVC
- Kenwood
- Krell
- Linn
- Luxman
- Marantz
- Mark Levinson
- McIntosh
- Metz
- Midland
- Musical Fidelity
- Myryad
- NAD
- Naim
- Nakamichi
- Nikko
- Onkyo
- Optonica
- Pentagon
- Philips
- Phonosophie
- Pioneer
- Pro-Ject
- Revox
- Rotel
- Saba
- Sankyo
- Sansui
- Sanyo
- Scott
- Sharp
- Sony
- Superscope
- Symphonic line
- T&A
- Tandberg
- Teac
- Technics
- Telefunken
- Thorens
- Toshiba
- TwinSound
- Vincent
- Wega
- Yamaha