that's called a dual bandpass box, where you have two "boxes" one on each side of the woofer tuned to different frequencies. and, yes, if not designed correctly, or not driven from an amp with a high damping factor, it will sound boomy. amps with low damping factors are tube amps with very little feedback, class D amps, or class A amps with no feedback. with a class AB amp with plenty of negative feedback, it should sound better, unless it was really poorly designed. you should also have something to reproduce high bass (100-500hz) as well, because most bandpass boxes roll of above 150-200hz, and will sound muddy if there is a hole in the 100-500hz range.