just installed a pioneer 5100 head unit. the fold out touch screen. found a 10 inch volfenhag subwoofer for a good deal. amazing head unit. now just have to figure out some tunning to get the best sound out of it. anyone one here a stereo guru?

Several of us here are into audio. I'm not familiar with that head unit or sub, but I'll give your questions a shot. What about the rest of the system (other speakers, locations, amps, eq, etc)?
John