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Audio speakers; Audio speakers for home; Signal processors for audio speakers; Speakers [audio equipment]; Speakers; Speakers for record players; Speakers for computers; Audio speaker enclosures; Monitor speakers; Sound reinforcement apparatus; Amplifiers; Electronic amplifiers; Electrical amplifiers; Pre amplifiers; Audio amplifiers; Sound amplifiers; Power amplifiers; Signal amplifiers; Control amplifiers; Headphone amplifiers; Guitar amplifiers; Stereo amplifiers; Musical instrument amplifiers; Audio effects apparatus; Audio mixing apparatus; Audio mixing consoles; Master audio mixing desks for use in recording studios; Electronic control apparatus; Instruments for recording sound; Apparatus and instruments for recording of data; Cleaning apparatus for sound recording discs; Instruments for the reduction of noise in systems for recording audio signals; Apparatus for the transmission of sound; Sound transmitting apparatus; Instruments for the transmission of sound; Apparatus for transmitting sound; Apparatus for the processing of sound; Apparatus and instruments for processing sound; Computer software to enable searching and retrieval of data; Audio signal range expanders; Audio signal range restorers; Control apparatus for audio signals; Electronic audio signal processors for compensating sound distortion in speakers; Mixing consoles; Amplifiers for musical instruments; Sound amplifiers for musical instruments; Electric and electronic musical effects equipment; Electrical amplifiers for use with musical instruments; Electronic control circuits for electronic musical instruments; Electric and electronic effects units for musical instruments; Signalling apparatus; Stereo signal generator apparatus; Loud speakers; Electronic units for transmitting audio signals; Security apparatus for processing audio signals; Electronic components; Studio monitor loudspeakers; Control consoles for lighting apparatus and instruments; Microphone mixers; Electronic audio/video signal distribution systems; Amplifiers for bass guitars; Electronic sound pickups for guitars and basses; Sound processors; Digital sound processors; Guitar effects processors; Analog signal processors; Audio dynamic characteristic modifiers; Instructional and teaching apparatus and instruments; Publications in electronic form; Downloadable publications in electronic form; Publications in electronic format [downloadable]; Training manuals in electronic format; Surround processors; Surround sound systems; Compact discs; Voice processors; Digital voice signal processors; Electronic magazines; Sound activated control apparatus for lighting installations