What do FI BTL N2 18's like for enclosures?

[East 10+ year member]

I have a Fi bTL N2 18" Fully loaded I run off a Crescendo 2k. My current box is 30hz @ 6.7ft^3 with like 14-15 inches of port per ft^3.

I have Kangaroux making me a new box aka Jesse Roux and I want it daily with low ground pounding bass. He says the difference between 30-32 is barely noticable and that my subwoofer would probably work better at 32-33hz with my vehicle (02 trailblazer LT) So I was thinking 7ft^3 @ 32hz with 15-16 inches of port.

Does this sound like a good design or should I reduce my port area/ft^3? I smash lows right now but I feel like I can get slightly more with a bigger/stronger and higher tuned box. Not looking for SPL numbers or anything just some nasty daily lows.

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[mlstrass 5,000+ posts]

Why would you tune higher if you want to play lower? Also that might be a little big on port area if you ever throw real power at that sub.

Do a 4th order...

 

[East 10+ year member]

Why would you tune higher if you want to play lower? Also that might be a little big on port area if you ever throw real power at that sub.
Do a 4th order...

Not enough room/money for a fourth order and I tuned higher to hit more of a equilibrium plus higher is closer to the vehicles peak, the low end won't change much from 30-32hz that's what I'm hearing its actually not even noticable. I've heard port area plays one of the bigger roles in low end bass so I figured a 15-16" port would be good.'

Also on the Dual 2 ohm BTL N2 18" the Fs is like 33.5 so I figured the closer I tuned to that number the better the subwoofer would perform, but I could be wrong.

 

[East 10+ year member]

bump