TOA was founded in Kobe, Japan in 1934 as a commercial audio system manufacturer. Since then, TOA has been manufacturing and marketing sound amplification equipment including microphones, amplifiers and speakers.

In response to the post-war democracy movement and active election campaigns, TOA created the world's first transistor-based megaphone and Japan's first reflex horn speakers. These products represent the foundations of the company's present success. With the period of rapid economic growth in Japan, emergency broadcast systems, which are commonly used in office buildings, became the main focus of their business.

TOA manufacturing facilities have a reputation for precision design and fabrication, resulting in a proven track record of TOA product reliability and longevity.

TOA's extensive line of audio products includes amplifiers, speakers, mixers, wireless microphone systems, digital processors and network audio. Security products include CCTV cameras, DVRs and integrated intercom systems used in security and communications applications.