High-fidelity audio apparatus, namely, amplifiers, speakers; audio amplifiers; personal headphones for sound transmitting apparatus; headphones; earphones; combined earphones and microphones; cordless headphones; electrical switches for loudspeakers; battery chargers, electric charging cables and current converters for use with headphones; carrying cases for headphones; boxes specially adapted for housing audio equipment; noise cancelling headphones; noise suppressor in the nature of electron...