I'm working on it... making my score "sky rocket" that is, lol.

 

Think a 1100.1 would do it. Hahahaha

 

The box is very important but once you get to a certain level most of your gains will come from the car itself.

 

Box is everything! Car can only gain so much, the rest is the box.
It's the only thing that has the most effect on the entire system and how well the subs, amps and batteries perform.

 

Outside, because there's more variables. If you have a sub in outer-space, it won't make any sound. The car is the real box.

 

so its then back to the enclosure because a sub wont respond well or handle power by just placing it in the vehicle.

remember, your only choices with a stock cabin are to deaden panels or reduce the cabin by creating a wall. if you choose not to wall, then you need a correct loading position within the interior to maximize pressure at the windshield.. As Less stated, the size shape and venting of the enclosure controls the woofer, its efficiency..and the amps efficiency and the enclosure will need to change based on the vehicle cabin that (cannot change)

 

how is your enclosure design research going?

 

the car is just a pressure chamber and obtain max. pressure in that chamber depends on the sub and box.

 

What do you recommend?

 

the old discussion...

this SPL thing works sitting on 3 equally important things:

box + port + sub;
power you can pull from the batts and throw on the subs;
car, how it reflects/absorbs the pressure waves and the effect this has on the pressure on the sensor area;

I really consider all equally important,

as you can have a panda and a wonderful box, if you are not around throwing 10kW+ at street B, as an example, you are not the loudest car, just like if you have a very good CRX box and a couple big amps, bunch of wire, you throw that on a stock CRX and you are 2 dB quieter.