I am not a fan of the tubes. I would much rather spend a few more dollars and use a nicer sub in a real enclosure. Check my sig for an 12" IDQ in a ported box. That thing pounds really nice when you want it to. :happysad:

In a hatchback like your Integra coupe, a single 12" is perfect. Even a single 10" can be great. If you are leaning towards 8" I would get a pair. But with the size of that box and the cost of the woofers, you would be better off getting a 12" or 10".