Video, compact disk (VCD), kaset, tape deck, tape recorder, piringan hitam, pita audio, pita video, pesawat komputer, perangkat lunak komputer, amplifier, speaker, equaliser, tuner, radio, compact disc player, DVD player, laser disc player, microphon, kabel audio, pesawat telephon, televisi, disket, batu baterai, antena, antena parabola, boster, ballast, trafo, mesin telex professional power amplifier, sound prosesor, speaker aktif, professional speaker system (untuk band, untuk lapangan, untuk studio)