I am not familiar with the system, but it sounds like you want to hook up a PC to your AVR? Being an active speaker typically means that each speaker has its own amplifier, rather than on a passive speaker design, where one would use an external amplifier, like and AVR. You can certainly hook up a PC to your AVR but your outputs/inputs will determine the best way to do that. Someone here with more knowledge about your system can probably be more specific, but I would need more information before I could advise you further.
Matteo
Matteo