i like the idea of the subs facing down so i can still put my gear bag back there when i go riding and so my dog won't tear the sub up, but do they sound any different. i saw that mtx thunderform has a box with two 10's for 319 and for around 130 more you can get an amp to go with it. has anyone used this set up. how would they sound with a stock hu. or do you think i should go with the tech12 setup.