box questions

[ngsm13 5,000+ posts]

I am kind of clueless on the box part of car audio. I have a sealed box for my 2 12" MTX 6000. I just got a small dual box so it would fit in the back of my extended cab truck. What is the advantage of having more cubic feet? What would be good for those 2 12's, i have a JBL 600.1 powering them. Also...does poly fill help?? thanx

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[Trixter 10+ year member]

Generally a larger box = lower bass. If you do not have room for a larger box, use poly fill in it to make the sub act like it is in a larger box.