AKG * ALTEC * AMEX * AMPEX * BELDON * CALREC * D&R * API * CANARE *  DAVEN * FLICKENGER * GML * HARRISON * LANG 

UREI * AUDITRONICS * LANGEVIN * ADR * MCI * MOGAMI * NEUTRIK * SCULLY * TELEFUNKEN * NEUMANN * UNVERSAL-AUDIO

NEVE * OTARI * LYDKRAFT * AMS * ROLAND * ECHOPLEX * MANLEY * PULTEC * QUAD-EIGHT * STUDER * TRIDENT * WESTERN * ELECTRIC