Stereo apparatus; stereo amplifiers; personal stereos; stereo receivers; stereo tuners; mp3 players; digital audio players; wireless computer peripherals; wireless local area network devices; apparatus for wireless transmission of acoustic information; wireless transmitters and receivers; audio speakers; audio amplifiers; high fidelity audio apparatus; electronic units for transmitting audio signals; integrated audio amplifiers; audiovisual receivers; audio-video receivers; signal processors for audio speakers; audio apparatus; speakers [audio equipment]; electric audio playback units with lights and speakers; audio speakers for home; audio equipment; audio-receivers and video-receivers; audio speaker enclosures; digital audio and video recorders and players; computer software for controlling the operation of audio and video devices; music centres [audio apparatus]; audio electronic apparatus; musical instrument amplifiers; electrical amplifiers for use with musical instruments; remote controls; devices for hands-free use of mobile phones; computer peripherals; computer software for controlling the operation of audio and video devices; computer software to control and improve computer and audio equipment sound quality; computer hardware