ACOUSTIC

Large portable sound reinforcement speakers and amplifiers designed for concert tour or convention service; [ commercial audio speakers, microphones and amplifiers, designed for office buildings, background music amplifiers and speakers; pagers for office buildings; emergency evacuation speakers, primarily audio that are installed in permanent public facilities; contractor audio-electronic controls and signal processors designed to be installed commercially; primarily audio control to route and switch music and speech information to speakers; speakers in cabinets; public address mixing consoles; ] power amplifiers; guitar and bas amplifiers, designed to be portable and used in night clubs, schools, and churches