ATC, Acoustic Transducer Company, is a specialist British manufacturer of loudspeaker drive units and complete sound reproduction systems, including the relevant electronic equipment. ATC designs and manufactures loudspeaker drive units and systems to achieve levels of performance far in excess of the industry norm. This is achieved by adopting a thoroughly professional engineering approach to the issue of basic design, materials science and production technology. ATC Loudspeakers. ATC Monitors. ATC SCM. ATC Speakers. Manufacturers of speakers, monitors, drive units and amplifiers.