I'm trying to build a box for a single FI BL 15, fully loaded. I want it tuned around 32-33 hz. Also my trunk in my car is kinda small height wise, so I was wondering if it was possible to put the sub on the top of the box and lower the height a little bit so the sub doesnt get close to the top of the trunk. The port I want on the front. Is that possible?

The dimensions I have so far are:

Width - 32

Height - 14

Depth - 25

Port Height - 12.5

Port Width - 5

Port Length 1 - 19.25

Port Length 2 - 8

62.5 inches Total Port Area, 3.8 ft^3 for box. Tuned at ~32.

Would it be possible to put the sub on top of the box with this design, and still have the port on the front?

Here's what I did with my BL. Is this what you mean by "sub on top port front?"

Hope this helps

Here's what I did with my BL. Is this what you mean by "sub on top port front?"

Hope this helps

Yeah that's exactly what I wanted to know. Thank you!

The trunk height in my car is about 16 inches, so should I make the box 14 inches tall, so the sub doesn't hit the top? Just to be safe

14'' will be too tall if you figure the sub itself is another 1.5 to 2 inches plus excursion. 12 to 13 inches will as high as I would go if the trunk is only 16 tall.

14'' will be too tall if you figure the sub itself is another 1.5 to 2 inches plus excursion. 12 to 13 inches will as high as I would go if the trunk is only 16 tall.

That is a good point.

Does this sound like good dimensions?

Btw this is my first box build.

31 inches wide, 12 inches tall, 24 inches deep.

3/4" MDF board

Slot Port Height - 10.5 inches

Port width - 4 inches

Port Length 1 - 19.25 inches

Port Length 2 - 3 inches

42 inches of port area.

3.3 cubic feet of total box volume, tuned to 31.49 Fb

14'' will be too tall if you figure the sub itself is another 1.5 to 2 inches plus excursion. 12 to 13 inches will as high as I would go if the trunk is only 16 tall.

That is a good point.

Does this sound like good dimensions?

Btw this is my first box build.

31 inches wide, 12 inches tall, 24 inches deep.

3/4" MDF board

Slot Port Height - 10.5 inches

Port width - 4 inches

Port Length 1 - 19.25 inches

Port Length 2 - 3 inches

42 inches of port area.

3.3 cubic feet of total box volume, tuned to 31.49 Fb

If those dimensions fit in your vehicle and create an enclosure with your desired internal volume and tuning frequency, then yes, those are good dimensions.