WAKG (company)
WAltec Lansing
WAndrea Electronics
WAudio-Technica
WBehringer
WBeyerdynamic
WBlue Microphones
WCarl Countryman
WGauge Precision Instruments
WGeorg Neumann
WIBall (company)
WJVC
WJZ Microphones
WK-array
WLipinski Sound
WManley Laboratories
WMicrotech Gefell
WMIPRO
WNady Systems, Inc.
WNTi Audio
WPanasonic
WPhonic Corporation
WPioneer Corporation
WRøde Microphones
WMārtiņš Saulespurēns
WSennheiser
WSony
WTOA Corporation
WYamaha Corporation