Okay, well after I purchased 2 Skar VVX 15s on a whim and built the box and realized that I made a horrible enclosure I tried to put some effort into designing a nicer response down low.
I already have a Behringer EP1500 (1100 RMS @ 4 Ohms...ish)
I have spent over 8 hours today modeling woofers in winisd and I think I found what I want and for a good price too.
Driver: Fi Q 18in Dual 2 Ohm VC
DUAL 1 | DUAL 2
Fs: 32.4 Hz | 32.1 Hz
Re: 0.7 Ohms/coil | 1.4 Ohms/coil
Qms: 9.31 | 9.37
Qes: .48 | .48
Qts: .46 | .46
Mms: 341g | 347g
Cms: 0.73mm/N | 0.73mm/N
Sd: 1210cm^2 | 1210cm^2
Vas: 149.7 l | 149.7 l
Spl: 92.0dB 1W/1m | 91.9dB 1W/1m
Bl: 13.9 N/A | 19.65 N/A
Sealed box: 4-8 cuft
Ported box: 6-10 cuft @ 28Hz
Sub OD: 18.500”
Cut ID: 16.750”
Mounting depth: 10.000”
Here is my WinISD graph (Keep in mind I am not looking for a flat graph or response particularily low. I want to have maximum output at around 26hz. This sub is for music only and I listen to alot of music that peaks in the 20Hz range.. I am spoiled my output down low in my car and want to get close to it in my house.)
(Click on photo to go to imageshack and the click on pic again to enlarge it)
Now to simplify my build I want to use Sonotube. I want to use a piece that is 24inches in diameter and 5 feet high. This gives me 15.7 Cubic feet of gross volume. My port I figured I would use the cheap Quickrete brand of sonotube that Lowes sells. It is 12" in diameter. So my port will be 12 inches in diameter and the length will be 23 inches as shown below
Please let me know if there is anything you would change. THANKS!
Edit: Is 1100w rms a safe amount of power in this size box? When would I exceed xmax?