Television sets; sound reproduction apparatus, namely, amplifiers, loudspeakers, surround-sound decoders, surround-sound receivers, surround-sound signal processors, sub-woofers, interconnect cables, preamplifiers, and volume attenuators; video disc players; video cassette recorders; video tape recorders; video line scaler, trans modulator, DVD players; compact disc players; set-top boxes; movie projectors; and projection screens