After doing a bit of research, I went ahead to buy myself an RCA to 3.5mm adapter for my speakers. Connected my 2 RCA to 3.5mm on the back of my PC.
I connected my FL and FR to LINE OUT.
My CEN and SW to C/SUB.
And my SL and SR to REAR.
With this built in amplifier in my subwoofer, I have set...