Radio, TV berwarna hitam-putih, pesawat video, VCD player, DVD player, laser disc player, kabel audio, compact disc player, antenna TV, radio, parabola, amplifier, tape recorder, boster, tunner, CB (citizen band), equalizer, walky talky, loudspeaker, box speaker, audio mixer, transistor, rewinder (alat memutar balik pita-pita audio), microphone, head speaker, gramophone, twiter (penyaring suara), pesawat telephone, hand phone, step up, step down, adaptor, trafo, komputer