ok i have a 98 gt and i have two twelve inch infinity subs and i need advice on what brand of box i should use of how i should have them installed anyone with info this would be appreciated and if you have someone to contact please let me know thanks
your gonna get 10 different answers,so i'll start with #1,first see what specs your woofers need for air space,then buy a box based on that,I prefer sealed,and the way they face,i prefer toward the back.
I would recommend making your own box, if you have the tools(if you don't have the tools stop reading). This way you can control the amount of airspace inside the box. Every sub has a range of airspace that it will perform as it is supposed to. The range allows for the user to add there personal taste to the sound.
Sealed:
With a sealed box the sub can handle a greater amount of power because of it's greater control. You will also get a much flatter response curve. Your personal taste can be added to the box by making it either slightly larger than spec, or smaller than spec. By making it larger than spec you can achieve a deeper "boomier" bass. This would be an advantage if you like rap, hip-hop, or dance/techno music. On the opposite end you could make the box slightly smaller than spec this would cause the sound to be tighter and have an extra "snap" to it, but you lose deep bass. This type of a box would be good for rock, alternative, punk, or eat your children music. The specs on a box were meant to give a little bit of everything.
Ported:
This gives a 3dB output boost (doesn't sound like much, but is the same as doubling the power to the same sub placed in a sealed box). It also makes for an increased response to lower frequecies, but a lesser response to higher bass frequencies. I recommend this box if you are a bass-head or have a greater appreciation for the fufillment capabilities of true bass. The rules for sizing beyond specs still apply but to a lesser extent for a smaller box.
If you could give a poo about making it perfect to your standards then just build it to perfect spec because as I said it will give you a little bit of everything.
In any case I would recommend facing your subs to the back of the car. I find that this makes the bass louder and punchier. The reason for this I am not going to explain.
sealed box no doubt, if you cant make your own buy one, make sure its made out of MDF (med. density fiberboard) not plywood! make sure its scrweed together not nail gunned. there easy to build or buy but sealed is the wayyy to go