Multi Source / Multi Zone Matrix Routing The Home Matrix 4 is a 4 zone home audio amplifier that allows you to route any source to any specific zone(s). For example, you can play Bluetooth on zones 1 and 2 and route microphone 1 to zones 1 and 2 while playing something in Zone 3 using an RCA input, and playing something else in zone 4 using the optical input. Power and Flexibility This is an 8 channel amplifier with 4 zones. Each zone has 2 sets of speaker outputs to power a left and right speaker. Each channel puts out 75 watts RMS @ less than 1 % THD. (Most ceiling speakers are around 40 watts only so this has more than enough head room). Each zone also has an RCA line output which allows you to add a subwoofer, or an additional amplifier, or more speakers to expand that zone. Lots of playback options This receiver has built in Bluetooth playback, USB playback, optical input, RCA input, FM radio, and 2 mic inputs. Flexible controls The controls are really easy to use. You can easily route any source to any zone(s) and select the volume levels for that zone from the unit or form the included remote. There is bass and treble EQ controls to customize the sound. The mic inputs have mic volume, mic bass, mic treble, echo, and delay controls making this perfect for karaoke and PA announcements.