I will soon have 2 pioneer Ts 3001D2 Subs (i have one now) and im wanting to build myself a box for these. Ive heard that subs up port back would be best but i figured id come to a forum to discuss. In case these matter, im thinking of tuning to 30 hz for better quality, and of coarse 2 ports, one for each sub. I will be amping them to a mono amp either 1000 rms or 1200 rms (500-600 rms per sub) My car is has the hatchback, not the other model. Thanks for any help