18 inch ported box design help

[Shorty Jenkans]

Hey guys Im trying to design a box for 1 18 and 2 15's to see which one would work better. I've got max dimensions of 40 wide, 24 tall, and 28 deep. So far I've used RE Audio box calculator for all my boxes and they seem to work pretty good. Ive got one for the 18 mocked up and it turned out to 8.146 cubic feet internal, tuned to 30.3 hz, 126 square port area (19.5 tall and 36 long, 6 inches wide), ITs a slot L port, and all baffles 1.5 inch think so double layer.

The 18 i would get would be the crescendo forte, Fs 27.1 hz, qes 0.69, qms 5.44, qts .40, vas 204L, BL 23.0

I was wondering if someone had winISD or some better box design program that could enter in those specs and see if the box would be ok? Or, if a L port is not the way to go, let me know! any help is greatly appreciated! Thanks

Click to read more...

 

[dbjunior 10+ year member]

That box looks fine. Whenever you have the money I always prefer more subs over less with similar cone area, off the same power . I would do two 15's depending what 15's and power used on each setup.

 

[Shorty Jenkans]

yeah man i feel ya. i think ill save up for a h/o alt and when i get that, thats when ill do 2 15s'. I've only got a ct sounds at900.1 right now so not much power