Pita kaset audio dan video, tape recorder, amplifier, speaker, equalizer, tuner/ radio, compact disc player, VCD player, laser disc player, DVD player, kabel audio, microphone, pesawat telepon, pesawat televisi, pesawat video, antena parabola, booster, ballast, trafo, bel pintu listrik, mesin teleks, active crossover, audio mixer, professional power amplifier, sound professional (compressor limiter, professional equalizer, echo, delay), professional speaker system (untuk band, untuk lapangan, untuk studio), alarm