Compact disc players; audio tape, cassette and disc recorders and players; compact disc player with magazine for holding and playing multiple discs and hard disc drive memory for temporarily storing disc content for easier access; video disc recorders and players; portable compact disc players; portable audio tape, cassette and disc players; digital audio tape recorders and players; combination disc players which play both video discs and compact or other audio discs; audio cassette players; video disc players capable of storing and automatically loading and playing multiple discs; electronic unit for adjusting the key of music played on a video disc player to the voice of a person singing along with that music; electronic unit for controlling video disc players actuated by insertion of currency, namely, juke boxes; stereo equalizers; stereo and surround sound amplifiers; stereo and surround sound receivers; stereo and high definition television tuners; record turntables; loudspeakers; loudspeakers for use in cars and boats; loud speaker systems sold separately or together as a unit comprised of woofers, tweeters, or mid-range speaker cones contained in a cabinet; speakers for personal computers; outdoor and illuminated loudspeakers; remote controllers for audio disc players, video disc players, video cassette recorders, stereo systems, video systems and televisions; microphones; wireless microphones; microphone receivers; connection boxes for multiple microphones; headphones; video cassette recorders; monitor televisions; flat panel television and display monitors; video amplifiers; video tuners; combination radio and audio cassette players for use in cars and boats; video monitors for use in vehicles; tweeters; powered tweeters; woofers; powered subwoofers; subwoofers; audio dynamic expanders; audio dual amp balancers; audio four channel switching boxes; audio noise suppressor; audio electronic crossovers; electrical adaptors and electrical power extension cords for use in connecting audio and video products; quick release mounting bracket and wiring harnesses for car stereo radio/cassette players; water-resistant covers for stereo radio/cassette players; global positioning systems for use in cars and boats; coin-operated video disc players; radio pagers