TOA is a specialist manufacturer of sound equipment for commercial and professional use as well as security and network communication system.

Bose Corporation is an American manufacturing company that predominantly sells audio equipment. The company was established by Amar Bose in 1964 and is based in Framingham, Massachusetts.

Jabra is a Danish brand specializing in audio equipment and, more recently, videoconference systems. It is owned by GN Audio, a division of the Danish company GN Group. Jabra engineers, manufactures, and markets wireless, true wireless, and corded headphones for consumers and business customers.