kicker L5 12 help about car?

[Michael]

i have a kicker ported box and 2 L5 12''in subs with a kicker zx 450.2 and with the birth certific it says 555 and i was just wanting to know well i know that that is not enough power to push the subs but what i was wanting to ask is how come it sounds differnt when i push my subs to the bumper like pushing them up instead of back it s sounds better ... when i push them twards the back all the way back then it sounds weeker and i on some songs it sound like my back deak wear my speakers sit that it is about to come offf or some thing some ppl said to port your car and my seats dont let down i have a (98) buick centurey and i was just wanting help i just got them and i was wanting to listent to them the way they are ment to be listend to untill i get a better amp..... will some one please help me urget........ you can all so email me back @ [email protected]