Design Questions for 10" Sundown SA in relatively small amount of space

[gmaney98]

Hi, this is my first post on this forum and was hoping to get some help in designing my first ported sub enclosure. I have built boxes for subs before but I usually just followed the manufacturers suggested design, this time around I am in a tighter space so I have been stuck with the task of designing my own. The sub is going to go in the trunk of my 2013 WRX which has an unusual 2 level trunk(pictured below) that I am trying to save as much room as possible in. Sub will need to go on the upper level to the left of that little white box you can just barely see. I plan to make a false bottom that follows the angle down so that I can make the enclosure deeper. Dimensions available are about 24 inches wide 12.5 inches tall and 14 inches deep(can play with this number a little). I was hoping to be able to fit a sundown sa 12 but from what I read it would probably be better to go with 10" at this size of box if I want to stay ported(I do). I plan to power the sub initially with a polk d1000.1, because I have one laying around and should power the D2 version well at 1 ohm. I have been playing around with RE's box calculator and wanted to know what you guys thought of the design I have so far. I think I have the math right (probably don't) to where after displacements should net me about 1.25 cu ft @ ~33 hz. I mostly listen to rap/hip-hop with some rock and folk mixed in. If my math is completely wrong and I'm crazy to think I can get a sub this size into that area just let me know I am open to suggestions. The more I look at the math the more I think it is wrong so if someone wants to drop any ideas down below I would be greatly appreciated.

 

[Joe X]

You could easily do a 12" in that trunk, you could get the box to the trunk folding down the rear seat, now if you have chosen a SA-10, I post the following for your reference or to build, would work with the amp you mention,  avoid the Re calculator since it's inaccurate, it doesn't even let you set a driver displacement among other flaws.

 

Power: to sub rated, amp subsonic filter to 28Hz, minimum port clearance 1 3/8", figure is just an assembly guide:

NOTE: If building outside you need to build a cardboard dummy box to test fit in it's way inside.

 

 

 

[blarg456]

Don't use that re calc. I learned the hard way.