| AB | DIGITECH | LUXMAN | ROSS |
| ACOUSTIC | DSC | LYTE QUEST | SABINE |
| ADCOM | ELECTRO-HARMONIX | MACKIE | SAE |
| AIWA | ELECTRO VOICE | MARANTZ | SAMICK |
| AKAI | EMU | MARK LEVINSON | SAMSON |
| AKG | ENSONIQ | MARK OTU | SAMSUNG |
| ALESIS | FENDER | MARSHALL | SANSUI |
| ALLEN & HEATH | FISHMAN | MARTIN | SCHOLZ |
| AMC | FOSTEX | MCINTOSH | SENNHEISER |
| AMCRON | FURMAN | MESA-BOOGIE | SHURE |
| AMERICAN DJ | GEMINI | MEYER SOUND | SOLID STATE LOGIC |
| AMPEX | GK | MIDAS | SONY |
| ARP | GOLDEN TUBE AUDIO | MITSUBISHI | SOUND CITY |
| ART | HAMER | MOOG | SOUND CRAFT |
| ASHLEY | HARMON-KARDON | MORLEY | SPIRIT |
| AUDIO ARTS | HARTKE | NADY | STEWART |
| AUDIO RESEARCH CORPORATION | HEATH KIT | NEUMANN | STUDER |
| AUDIO TECHNICA | HI WATT | NEVE | STUDIOMASTER |
| AUTOCOM | HIGH END SYSTEMS | NIKKO | SUNFIRE |
| B&O | HILL | NSI | SUNN |
| BBE | HUGHES & KETTNER | NORD | SWR |
| BEHRINGER | IBANEZ | NUMARK | TANBERG |
| BGW | INFINITY | OBERHEIM | TAPCO |
| BOGEN | J.L. COOPER | ONKYO | TASCAM |
| BOSE | JBL | ORANGE | TC ELECTRONICS |
| BOSS | JIM DUNLOP | OTARI | TEAC |
| BROWNSVILLE | JOHNSON | PANASONIC | TELEX |
| BSS | JOLIDA | PASS | THRESHOLD |
| CARVER | JVC | PEAVEY | TIMES SQUARE |
| CARVIN | KAWAI | PHONIC | TOA |
| CASIO | KENWOOD | PIONEER | TRAYNOR |
| CITATION | KLARK TEKNIC | PLUSH | UREI |
| CLAVIA | KORG | PRO-CO | VARILIGHT |
| CLEAR-COM | KRELL | PROTEUS | VEGA |
| COUNTRYMAN | KURZWEIL | PULSAR | VESTAX |
| CRATE | KUSTOM | PYRAMID | WARWICK |
| CREST | LAB | QSC | WHIRLWIND |
| CROWN | LANEY | RAMSA | WHITE |
| DAVID EDEN | LEPRECON | RANDALL | YAMAHA |
| DBX | LEXICON | RANE | YORKVILLE |
| D-DRUM | LIGHT WAVE | REVOX | ZENITH |
| DEAN MARKLEY | LINE-6 | ROCTRON | |
| DENON | LITE-TRONICS | ROLAND | |
