blank magnetic data carriers; blank recording discs; data processing equipment, namely, couplers; audio processing apparatus, namely, limiters and compressors; high-fidelity sound and video equipment, namely, audio speakers; computer sound systems and apparatus, namely, sound systems comprising remote controls, amplifiers, loudspeakers and components therefor; loudspeaker systems; loudspeakers; loudspeaker software, namely, software for processing sound in loudspeakers; electrical transducers...