The setup in this vehicle now dominates the whole issue of being soundproof. The entire car is being pulled to pieces and i can move pictures in houses i park 15-20 feet in front of. We'll see how loud it gets on an AQ2200Di had the same problem with my friends '97 lumina. i WAS running a vr3 200 watt to a pioneer 800. it sounded like complete ****. i found out the wiring he used in it for the power supply from the battery was roughly a 26-30 guage wire so i replaced it with 8 gauge, that got it bumping a little harder. after awhile i replaced it with a pyramid P717x arctic series 1000 watts. you can definitely tell it has subs in the back now... so with the position your in, i would just upgrade to a higher wattage amp
Being loud outside the car isn't going to get you anywhere except ticketed. While it does feel good the first few times someone comes up and tells you that they felt you inside their car, or the building they were in; it will get old. I have people call me up now because they know I was somewhere in the area....You can certainly hear it in the car, it rattles a little bit that you can hear. Not amazing though
My friend has an HCCA and it hits hard and you can hear it from a long distance away. It will move my car just being parked next to his!