So my system question?

okay so i now have the p2 12's in my trunk in a ported box and have had many different amps on it like kicker mtx and kenwood. and they all sound about the same quality so im thinking its the speakers? and now im putting in the mtx thunder square 2 12's in a ported box powered by another different amplifier alpine mrp m1000 so im asking this new system will sound different and good right?