Acoustic amplifiers; amplifiers; amplifiers for musical instruments; analog-to-digital converters; audio mixing desks; peripherals adapted for use with computers; mounting brackets adapted for computers; headphones; high fidelity sound systems; loudspeakers systems; loudspeakers with built-in amplifiers; loudspeakers; microphones; analogue sound modifiers; loudspeaker stands [adapted for]; connection cables; connections for electric cables; audio receivers; car audio apparatus, namely, radio, amplifier, loudspeaker; audio cable; audio conference apparatus, namely, microphones, loudspeaker, feedback-controller; audio interfaces; audio testing apparatus, namely, microphones, digital audio processor, acoustic measurement systems; audio transmitter units; public address systems; digital amplifiers; electronic audio signal processors for compensating sound distortion in speakers; racks for loudspeakers; wireless audio speakers; pair able wireless audio speakers; speakers for computers; mobile phone speakers; speakers for record players; speakers for portable media players; speaker for docking stations; cases for loudspeakers; speaker mounting brackets (adapter for speaker); loudspeaker cables; power transformers for amplification; monitor speakers; horns for loudspeakers; signal processors for audio speakers; sound mixers with integrated amplifiers; portable speaker docks; public address speaker systems.