ECHO SUB

Speakers; smart speakers; audio speakers; amplifiers; software for updating wireless speakers, amplifiers, loudspeaker systems; electrical power processors-, namely, power amplifiers; acoustical transducer systems for reproducing sound; home entertainment systems comprised of digital music players, digital music controllers, speakers, and amplifiers; audio and home theater equipment, namely, stereos, loudspeakers, audio speakers, amplifiers, equalizers, crossovers, audio processors, audio tuners