Altec
Electro-Voice
Leak
Revox
Armstrong
Ferrograph
Marantz
Rogers
Avantic (Beam-Echo)
Fisher
McIntosh
H. H. Scott
Bell
Goodmans
Pamphonic
Sherwood
Bogen
Grommes
Pilot
Sansui
BTH
Harmon Kardon
Pye
Stromberg-Carlson
Clarke & Smith
Heathkit
Quad
Truvox
Dynaco
Knight
Radford
Miscellaneous USA
Eico
Lafayette
RCA
Miscellaneous UK
