All brand new, just installed, cant get the sound I should get from this gear, I need help! Places like Tweeter wont help as they dont do CarPC stuff

HP dc7800 PC
USB Sound Blaster 24bit External Live or USB SB X-Fi (have both)
2x10inch BA G5's
JL 1000/1 for subs
JL 450/4 for rear/fronts/tweets
Front = Focal Polyglass 165VR
Rears = Focal Access 690CA1

I want bass! and loudness. I have the Radio Shack dB device also

I live in central MA, but will go anywhere.

Let me know!