Apparatus and instruments for recording, transmission, reproduction, receiving, downloading, storage and editing of sound or images, namely, personal stereos, stereo amplifiers, stereo receivers, stereo tuners, radio tuners, audio and video receivers, television receivers, optical disc players and recorders, audio and video cassette players and recorders, portable digital music players, record players, car stereos, audio speakers, audio and video circuit boards, hard disk players and recorders, video projectors, video projector screens; video display apparatus, namely, plasma displays, liquid crystal displays (LCD), and cathode ray tube displays (CRT); loudspeakers; cabinets for loudspeakers; headphones; horns for loudspeakers; speaker systems consisting of loudspeakers and cabinets for use with loudspeakers; digital audio and video signal processors; digital audio and video network receivers; digital audio and video network servers; computers; personal digital assistants (PDA); hard disk drives; computer software for recording, transmission, reproduction, receiving, downloading, storage and editing of sound or images; storage media having computer software recorded thereon, namely, magnetic and optical memory devices in the form of cards, discs or tapes featuring computer software recorded for recording, transmission, reproduction, receiving, downloading, storage and editing of sound or images; computer peripheral devices; blank memory devices in the form of cards, discs or tapes; carriers of computer software for recording, transmission, reproduction, receiving, downloading, storage and editing of sound or images; cables for use with audio and video apparatus and computers; speaker mounting brackets; speaker mounting stands; remote controllers and remote control apparatus for use with audio and video apparatus and computers; electric power supply for use with audio and video apparatus and computers