Re: Looking for some good suggestions on a box design
If you have a windows computer I would recommend downloading torres box calculator you can find it on the internet for free then after that for an SUV I would recommend sub firing upwards port to the rear, the rule of thumb for slot ports is 12-16 inches per cubic foot personally I shoot for over 14 but that's just me tuning would really depend on the type of music that you listen to personally I would go lower than 43 though it would most likely sound loud to the ear like a pre fabbed box but it probably won't have the low end extension that you're looking for if you were to tune to 43hz.
Car:2004 Grand Prix
Wires: 6 Runs Electron Beam 2/0
Batteries: Juicebox Lithium 40ah
Amp: Flatline 7k
Substage:Custom Fi N3 15's