Audio equipment, namely, loudspeakers, speaker housings and enclosures, speaker volume controls for use with audio equipment, loudspeaker systems, amplifiers, pre-amplifiers, equalizers, signal processors, crossovers, accumulators, and cable connectors; cables, namely, audio-video cables, remote control cables for use with audio and video equipment, frequency stabilizers, audio circuit isolators, electrical signal attenuators, transducers for audio equipment; transformers, baluns, video cables; audio, video and audio/video apparatus and instruments, namely, video transmission apparatus, sound equalizers, digital video cameras, and parts and fittings therefor; scientific, nautical, surveying, electric, photographic, cinematographic, optical, weighing, measuring, signaling, checking, audio, video, audio/video, and automotive audio electric cables and connectors therefore, electric switches, and wired transmitters; apparatus for recording, transmission or reproduction of sound and images; replacement parts preceding aforesaid equipment