This Dangerous Music 14-Channel Analog Atmos System consists of one Monitor ST and three expansion modules to create a pro-level mixing and mastering system. The Monitor ST provides flawless sound and supports Talkback, Solo, Dim, Mute, and Mono Controls with a dedicated output. The three expansion modules enable creating a versatile surround monitoring solution that's accurate, clear, and flexible. This system supports up to 14-channels of audio.