Help Wanted, Sealed 18" Enclosure Calcs

[spy8181]

I'm finally done collecting parts to make this happen. The one thing I need help with is enclosure size. I have messed around with bass box pro and still don"t think I quite know what I'm doing. I know some of you guys can do this in your sleep so I'm asking for your help before I start a build thread.

Sealed enclosures EQed by a SMS-1 or possibly with TACT in the future.
Powered by a Behringer EP4000 at 4Ohms per channel
Drivers: Fi Q18 Dual 2 Ohm with the high QTS option. They said it bumps the QTS to ~.57

Q18

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
Xmax: 28mm
Rms: 1500W
Sealed box: 4-8 cuft
Ported box: 6-10 cuft @ 28Hz
Sub OD: 18.500”
Cut ID: 16.750”
Mounting depth: 10.000”
Displacement: 0.24cuft

I'd like to keep the box as small as possible without suffocating the driver. I was thinking a 24" cube externally OR SMALLER. My net volume calcs for a 24" cube come out to about 5.36cuft after subtracting driver and bracing. I'm worried this may start to kill bottom end.

[Deleted]

anywhere between 4-6 cubic feet for this driver is optimal. Your 24" cube is right on the money. Thats the size most of the guys are building for that driver. Check out the DIY section on AVS, there is TONS of info on your driver.

[edoggrc51]

+1

Like Nate says, there's tons of info in the DIY section of AVS, but it sounds like you're on the right path. Make sure and keep us posted on the progress of your build. I almost went the Fi route myself but then decided on the LMS's at the last minute.

Remember, pics or it didn't happen! ;D

[spy8181]

The project isn't dead yet! I am going to finish it up in solidworks and get the drawing over to the cnc router guys for a quote. I wanted to do the LMS's as well but I couldnt afford it, but if N8 knows where to get them cheap that is a possibility!

[spy8181]

[spy8181]

[spy8181]

[spy8181]

[spy8181]

[Deleted]

Wow, love the bracing you did on these.. what drivers are you going to use?

[B.Hulk]

Wow...really nice work. Looking forward to seeing them finished.

[annjones13]

Spy8181,

Wow this build looks really good!
I signed up for the group buy for a UXL 18.
So I think I will use your design to build the sealed enclosure for it.
I thought about using Eric's DIY Sound Group flat pack, but it's only 4 cubic ft.

What a great job you are doing....

Ann