I have a 2003 Pontiac Vibe and an AA Mayhem 15 and Im trying to figure out, ideally, what size box would give me best results and what way to fire my sub and port. Can anyone tell me how to figure that out? Like different variables associated with this. I was thinking sub up port back.

I have a 2003 Pontiac Vibe and an AA Mayhem 15 and Im trying to figure out, ideally, what size box would give me best results and what way to fire my sub and port. Can anyone tell me how to figure that out? Like different variables associated with this. I was thinking sub up port back.

Sub up port back has been what most people will recommend. I would follow AA box specs.

yeah it says 3-5 cuft but whats the diff in sound of 3 cuft vs 4 cuft vs 5 cuft?

Larger poerted enclosures tend to be more efficient and require less power. Just the opposite on smaller ported enclosures.

How much do you think a box to specs would cost if I had someone on this site build it and ship it to me?

Well the only sure fire way is through trial and error, but like most of us, you don't want to build several boxes for testing and in the end, use one.

Generally the larger the enclosure, the more efficient it becomes, but there are draw backs. You could always download winisd, plug in your drivers, and start messing with enclosure models. See how enclosure volume and tuning changes the frequency response.

Or if your lucky, you might someone who has already done testing with your vehicle.

Enclosure costs will depend on the size, weight, and time of ups shipping. One day shipping may be $100 and two weeks later it's $150.