Great Metropolitan Sound is an audiovisual design and installation hub whose services include lighting, shade- and climate-control automation and computer networking. Integrating the latest from RTI, Crestron, Sonos, NAD, Bluesound and Marantz, the team installs multi-room music systems and surround-sound home theatres, all controlled from your smart device. If flush-mounted speakers are not seamless enough for you, consider invisible speakers by NakyMatone, built right here in the GTA.