Audio amplifiers; loudspeakers; cabinets for loudspeaker; [ karaoke systems comprising karaoke machines, karaoke players; ] electronic sound processing apparatus; [ audio cables and connectors; microphones; wireless microphones systems comprising microphones, microphone cables, stands, modules; electric DJ controllers; electric MIDI controllers; CD and DVD players; digital media players and recorders, namely, digital audio players, mp3 players, mp4 players; FM radio receivers; digital radio receivers; ] audio mixing systems comprising sound mixing apparatus