WADAM Audio
WArchéophone
WAudio control surface
WAudio editing software
WAyre Acoustics
WBurns Tri-Sonic
WCardboard record
WClicker
WCompressed air gramophone
WEnhanced CD
WFender Vibrasonic
WHigh Fidelity Pure Audio
WDJ K Crakk
WK-system
WLathe (audio mastering)
WLine-in recording
WLoudness compensation
WMagnetostatic loudspeaker
WMIL-CD
WMix-minus
WMP3 Surround
WMullard 5-10
WNady Systems, Inc.
WOptophone
WPenteo
WPhasor (sound synthesizer)
WPhonic Corporation
WPitch control
WPocketDisc
WRane Corporation
WRealistic (brand)
WSiraTone
WSound truck
WSpeaker terminal
WDJ Switch (Ghanaian DJ)
WTOA Corporation
WYamaha MU-series
WZeppelin (iPod speaker system)