Hows this box sound? 10.5 net @ 34 hz

[I Like Waffle]

For 2 custom sundown 18s, this is what jacob reccomended so im gonna go with it, been a while since i designed a slot port box so im trying to figure out my math again. Im thinking 10.5 net, with a port 8x12x13.5 will get me almost a cube of port area? Is this enough? Box will be about 12 cubes gross, so im estimating 10.5 after sub and port displacement, can make it a little bigger if i need though.

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[RAM_Designs 5,000+ posts]

Port is too small, you need about 13ft^3 before any displacements to use an adequate port.

 

[RAM_Designs 5,000+ posts]

The 8x12 port gives you 96in^2 of port area, which is less than 10in^2 per ft^3...shoot for around 130-150in^2.

 

[I Like Waffle]

I had a feeling it was way too small. What port size would you reccomend for the box? I have 6 and 8" pvc as well.

 

[RAM_Designs 5,000+ posts]

What dimensions will the box be? If you have 12ft^3 at the most, then you'd probably want to do something like 10ft^3 net, because the port is going to take up 1.5ft^3 on it's own, at the least.

 

[I Like Waffle]

I can do 13ft gross if needed, ill just have to cut some holes in the box and extend it from the inside with little MDF pods or something. Its a trunk car so at 50x37x12 im cutting it close with space. What i figured i might do is build the box in the car, leave the top baffles off, and make like 10x6x24 little boxes to go on the outer sides of the box, maybe net it 1.5 more cubes.