Trunk build: 4 Sundown Sa-12s Box Help/ Suggestions

[Joe X]

Here is another suggestion it achieves about 7.8 cubic feet @ 33Hz and two subs fully front firing:

Some improvements pending.

[Wood]

Here is another suggestion it achieves about 7.8 cubic feet @ 33Hz and two subs fully front firing:

Some improvements pending.

i like this design also.. quick question, when doing the blowthrough and sealing it from the trunk, does the box have to be pushed all the way against seat or could it sit back a little? the reason i ask is because the cut out behind my seats arent as wide as my measurements and the excursion from the sub could hit it. i'll upload a picture to better show my trunk and how its arranged... but thats a sweet design and it gives almost the optimal space along with bracing which is very necessary

[Joe X]

No it does not have to be pushed against the seat at all in fact some airspace in front of the sub is beneficial, the idea of sealing off is that gets done air tight so you pressurize a smaller volume. There a number of improvements that can be done but you need to carefully consider your space and then it gets modified to a final spec.

[Wood]

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[Wood]

[Wood]

No it does not have to be pushed against the seat at all in fact some airspace in front of the sub is beneficial, the idea of sealing off is that gets done air tight so you pressurize a smaller volume. There a number of improvements that can be done but you need to carefully consider your space and then it gets modified to a final spec.

if you notice in the pic there is a bar at the top, from there to the back of the seat is at 4 - 6 in. would that be ideal?

[Wood]

Also do you think you could design one that is around the same cu ft with all subs facing the center, or is that the point of the 2 subs facing the front to give it extra cu ft?

[Joe X]

6 in would be ok, and yes net internal volume maximizes the way is drawn right now. You just need to figure out a seal off plan, will your back seats fold down?

[Wood]

6 in would be ok, and yes net internal volume maximizes the way is drawn right now. You just need to figure out a seal off plan, will your back seats fold down?

OK, i figured that would be the reason for the front subs.. And Yes my seats will fold down.. Is there a way you could provide me a cut out sheet for the design you gave me?

[Joe X]

6 in would be ok, and yes net internal volume maximizes the way is drawn right now. You just need to figure out a seal off plan, will your back seats fold down?

OK, i figured that would be the reason for the front subs.. And Yes my seats will fold down.. Is there a way you could provide me a cut out sheet for the design you gave me?

I will consider some improvements, check calculations and then provide you a cutsheet by tomorrow.