Antennas; Tweeters; Woofers; Audio adapter cables; Audio adapter plugs; Audio equaliser apparatus; Audio equalizer apparatus; Audio mixing consoles; Audio receivers; Equalisers being audio apparatus; Equalizers being audio apparatus; Loudspeakers, headphones, microphones and CD players; Musical instrument adaptors; Musical instrument connectors; Musical instrument digital interface controllers being audio interfaces; Radio wave transmitting aerials; Video cables