Black Box AC1120A User Manual

 

 

 

The audio outputs of the matrix are balanced. So a + and a – are provided for each 
side. There is also a ground connection available. If you are going to connect the 
matrix output to a single-ended audio device (one with RCA or phono 
connectors), then use the + of the left, + of the right, and ground. On the other 
hand, if you will be connecting the output to professional audio gear it is best to 
use the differential + and – (balanced) outputs of each side that offer immunity to 
noise. 

Figure 4 – Typical balanced audio output connector 

 
The balanced audio outputs are provided on detachable screw-terminals. Mating 
connectors for all outputs are also provided.   
 

The matrix has a built-in universal power supply. The AC input connector on the 
rear of the matrix is an IEC320 / C6 and is always shipped with a North American 
power cord (shown below). If you want to use the matrix in a country with 
different plug type, you should purchase your own cable or adapter. The Matrix 
supports both 110 V, 60 Hz and 220 V, 50 Hz power systems. There is a power 
on indicator light on the front panel 
 

   Figure 5 – End of IEC320 / C6 power cord 

 

The matrix can be controlled from either RS-232 or through IP.  
 

The AC1120A and AC1122A (without IP feature) actually have 2 separate and 
independent RS-232 control ports.