I was wondering does box size really matter. I have a 18in re mx in a box that came with it because i bought it used . The box is like 7 cubes or so sealed. Recommend is like 3 or 4 sealed. It doesnt sound good at all to me. And doesnt have much punch either. It only has 600 watts to it but my 15 mojo had more kick at 300 watts. Why is this and should i go ported or sealed for this.