barang-barang elektronik, pesawat televisi, radio, tape recorder,amplifier, speaker, equalizer, tuner/radio, compaot disc player, VCD player,DVD player, laser disc player, kabel audio, microphone, pesawat telephone, diskette, pesawat penggerak otomatis, mesin -mesin bicara, kas register, batu battery, pesawat video, antenaparabola, booster, ballast, trafo, disk optik, bel pintu listrik, audio mixer professional power amplifier, sound processor (compressor limiter, active crossover, professional equalizer, echo, delay), Professional speaker system (untuk band, untuk lapangan, untuk studio)