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Headsets; Wireless headsets for use with mobile telephones; Music headphones; Headphones; Stereo headphones; Speaker enclosures; Audio amplifiers; Equalizers [audio apparatus]; Audio interfaces; Sound recording carriers; Audio- and video-receivers; Audio circuit boards; Computer hardware; Computer software; Downloadable software applications; Computer software, recorded; Cell phones; Personal digital assistants; Portable computers; Laptop computers; Peripherals adapted for use with computers; Computer software applications, downloadable; Headphone amplifiers; Adapter cables for headphones; Headphone-microphone combinations; Headphone consoles; Audiovisual headsets for playing video games; Wireless headsets; Communications head sets; Headsets for use with computers; Headsets for virtual reality games; Internet phones; Hands-free headsets for cell phones; Virtual reality headsets; Headsets for mobile telephones; Wireless headphones; Wireless headsets for smartphones; Wireless headsets for tablet computers; Two-way plugs for headphones; Phone plugs; Cases for headphones; Ear pads for headphones; Microphones; Loudspeakers; Pairable wireless speakers; intelligent speaker; Video frequency amplifiers; Audio frequency amplifiers; Audiovisual apparatus; Digital audio interface apparatus; Cleaning apparatus for magnetic or optical data media; Acoustic couplers; Automobile stereo adapters; Audio speakers for vehicles; Portable speakers; Wireless speakers; Integrated audio amplifiers; Audio amplifiers; Audio conference apparatus; Audio processing apparatus; Audio switching apparatus; Stereo amplifying apparatus; Audio analyzers; Audio apparatus; Musical instrument amplifiers; Radios for vehicles; In-ear headphones; Booms for microphones; Electric and electronic musical effects equipment; Sound reproduction apparatus; Sound recording apparatus; Audio effects apparatus; Music headphones; Telephone headsets; Audio mixing consoles; Acoustic conduits; Audio compressors; Loudspeaker cables; Speakers for computers; Speaker enclosures; Speaker enclosures; Sound samplers; Sound processors; Digital sound processors; Stereo headphones; Megaphones; Audio interfaces; Computer hardware for signal processing of audio and video; Surround processors; Sound projectors; Microphone mixers; Digital mixing desks; Sound mixers with integrated amplifiers; Power mixers [audio apparatus]; Audio mixers; Speaker mounting brackets; Microphone stands; Loudspeaker systems; Surround sound systems; Public address speaker systems; Loudspeaker units; Loudspeaker drive units