Need input for box size for 2 sa 15s @ rms rating

[SQL50]

Sundown specs are from 3-4 cu ft on ported airspace. I know power has a lot to do with it, so what would be the best size for running rms? Thanks in advance. It will be my first sundown build, so I'm not familiar with box builds on them.

[RainStryke]

Have a few questions:
What amp are you using?

What are the measurements of the area you have to work with?

[SQL50]

95 4dr jeep cherokee, rockford r1200-1d, about 42w 20-22 h 27d, that's my whole cargo area.

[ToNasty]

7.5-8 cubes tuned to 34

[SQL50]

Thanks, I plan on upgrading the amp eventually but I figure it would do alright for a little while.

[Joe X]

So here is a suggestion, power: to subs rated, amp subsonic filter to 28Hz, minimum port clearance 5 1/2", figure is just an assembly guide. bracing is 1.25" wooden dowel rods, only the top to bottom braces and the internal port brace are really necessary:

[SQL50]

I sent you that pm before I realized you posted this design, my bad. But it looks like a great design, what kind of mods would I have to make to the box to get it at about a 32 hz tuning? I haven't tried a port design quite like that one before.

[SQL50]

Or well.. 34hz will work for me. I do have a port question though, how are you calculating the tuning frequency, port area & length on it?

[Joe X]

Port area and effective length as always.

[SQL50]

Ok, I guess the port being centered kinda threw me off.