Television apparatus for projection purposes; multimedia projectors; video projectors; cabinets for loudspeakers; loudspeakers; subwoofers; sound transmitting apparatus; horns for loudspeakers; wireless speakers; portable vibration speakers; headphones; virtual reality headsets; headsets; headsets for playing video games; microphones; wireless microphones with integrated speakers; downloadable computer software, namely, downloadable mobile applications for setting up, configuring, and control...