Amplifiers; Analog to digital converter (ADCs); Audio amplifiers; Audio cables; Audio circuit boards; Audio equipment for vehicles, namely, loud speakers for automotive audio systems; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio mixers; Audio processing equipment, namely, limiters and compressors; Audio recorders; Audio speaker enclosures; Audio speakers; Audio tape recorders; Audio-frequency transfor...