bicara, kas register, batu battery, pesawat penggerak otomatis, disk dan pita audio dan video, pesawat video, antena parabola, booster, ballast, trafo, bel Iistrik, mesin teleks, audio, echo, delay), professional speaker system (untuk band, untuk lapangan, untuk studio), mesin penjual, mesin-mesin, Elektronik yaitu : pesawat televisi, tape recorder, Amplifier, speaker, Equalizer, tuner/radio, compact disc player,, mixer, professional power amplifier, sound processor (compressor limiter, active-crossover, professional equalizer,, veD Player, DVD player, laser disc player, kabel audio, microphone, pesawat telepon, mainan video, computer disc,