Kamera, alat-alat potret, alat-alat optik, video compact disc / VCD, tape recorder, amplifier, speaker, equalizer, tuner/radio, compact disc player, VCD player, DVD player, laser disc player, microphone, pesawat telepon, pesawat televisi, pesawat penggerak otomatis, antena parabola, booster, ballast, trafo, disk optik, bel pintu listrik, mesin teleks, audio mixer, professional power amplifier, sound processor (compressor limiter, active crossover, professional equalizer, echo, delay), professional speaker system (untuk band, untuk lapangan, untuk studio)