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CONFERENCE COMPOSER LAYOUT 
Most of the default parameters of the EF2280 will satisfy our design.  However, we will need to 
change the Mic/Line Inputs, Automixer, Matrix Mixer, and Presets to satisfy our design goals.   
 
Mic/Line Inputs 
 
On Inputs 5-7, the AEC needs to be set to R2 as shown in Figure 25. 
 
 
Figure 25.  Setting the microphone inputs 5 – 7 to reference R2. 
 
Matrix Mixer 
 
The matrix mixer will need to be changed from the default settings in order use Outputs A and B 
for the amplifier, and Outputs C and D for the VSX 8000.