Pita-pita kaset rekaman, tape recorder, amplifier, speaker, equalizer, tuner/radio, compact disc player, VCD player, DVD player, laser disc player, kabel audio, microphone, pesawat telepon, pesawat televise, pesawat computer, diskette, alat-alat potret, alat-alat optic, pesawat penggerak otomatis, mesin-mesin bicara, kas register, batu battery, pesawat video, antenna parabola, booster, ballast, trafo, disk optic, bel pintu listrik, mesin teleks, audio mixer, professional power amplifier, sound processor (compressor limiter, active crossover, professional equalizer power, echo, delay), professional speaker system (untuk band, untuk lapangan, untuk studio)