Audio circuit boards; Musical instrument amplifiers; Audio amplifiers; Loudspeakers with built in amplifiers; High-frequency switching power supplies; Power amplifiers; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Stereo amplifiers; Sound systems comprising remote controls, amplifiers, loudspeakers and components therefor; Power adapters; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers...