WAcoustic Research
WADAM Audio
WAdvent Corporation
WAltec Lansing
WAmphion Loudspeakers
WBang & Olufsen
WBehringer
WBoombotix
WRudy Bozak
WCabasse (company)
WCambridge SoundWorks
WCanton Electronics
WDanish Audiophile Loudspeaker Industries
WDefinitive Technology
WEdifier
WEminent Technology
WFocal-JMLab
WForsythe Audio
WFunktion-One
WGeneralmusic
WInfinity Systems
WIBall (company)
WInfinity Systems
WJBL
WJLab Audio
WJVC
WK-array
WKLH (company)
WL-ACOUSTICS
WLipinski Sound
WMackie
WMagnepan
WMartinLogan
WMonsoon (speakers)
WNAD Electronics
WNHT Loudspeakers
WPeavey Electronics
WPhonic Corporation
WPioneer Corporation
WPolk Audio
WQuad Electroacoustics
WRadioShack
WRectilinear Research Corporation
WRega Research
WRenkus-Heinz
WSonodyne
WSony
WSteinway Lyngdorf
WTannoy
WTelavox
WTeufel (manufacturer)
WTOA Corporation
WTotem Acoustic
WVeritone Minimum Phase Speakers
WVoxx International
WWilson Audio
WYamaha Corporation
WYorkville Sound
WZR Speaker Lab
WZu Audio