The 4.8 SP has 4 inputs and 8 outputs, while the 3.6SP ahs 3 inputs and 6 outputs. The front panel interface allows quick access to all control parameters by offering dedicated function buttons, eliminating the need for hidden sub-menus. For even faster set-ups and stronger visualization of INPUT/OUTPUT routing, EQ, and filter curves, a USB port is provided for use with 

Windows? Proteant software. Full control by third part controllers is available via RS-232.