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LOUDSPEAKERS; LOUDSPEAKER CABINETS; APPARATUS FOR USE IN THE RECORDING, STORAGE, TRANSMISSION OR REPRODUCTION OF SOUND; CABLES FOR THE TRANSMISSION OF SOUND AND IMAGES; LOUDSPEAKER CABLES; INTERCONNECTS, NAMELY, CABLES WHICH INTERCONNECT INDIVIDUAL AUDIO AND VIDEO DEVICES; ELECTRICAL CONNECTION APPARATUS, NAMELY, APPARATUS FOR CONNECTING A STORAGE DEVICE FOR STORING AUDIO AND/OR IMAGE DATA TO ANOTHER ITEM OF EQUIPMENT; ELECTRICAL CONNECTION APPARATUS FOR CONNECTING PERSONAL MUSIC STORAGE DEVICES TO AN AUDIO AMPLIFIER; APPARATUS FOR PROVIDING A DATA CONNECTION FOR AN AUDIO AND/OR IMAGE DATA STORAGE AND RECORDAL DEVICE; POWER SUPPLY UNITS FOR USE WITH APPARATUS FOR USE IN THE RECORDING, STORAGE, TRANSMISSION OR REPRODUCTION OF SOUND