Amplifiers; Antennas; Aerial amplifiers; Amplifiers for wireless communications; Antenna filters; Antennas for wireless communications apparatus; Audio amplifiers; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Bass amplifiers; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion de...