View Full Version : 18" FI BL Box

04-20-2007, 12:10 PM
Ok so i havent found a definate answer about what is the recomended box size for a 18" Bl....also what is the tunning freq for the port?? Does anyone have any cut sheets for what they used to build there box??THANKS ALOT max dimensions: 51" width 28" high 18 to 19" depth

04-20-2007, 02:27 PM

04-20-2007, 02:47 PM
here is a pic of what i would like it to look like....maby not that long.......but somewhere close.....it is going in the back of an ext cab silverado......

04-20-2007, 02:58 PM


Fs: 33.1 Hz | 32.5 Hz
Re: 0.75 Ohms/coil | 1.5 Ohms/coil
Qms: 6.43 | 6.54
Qes: .53 | .49
Qts: .49 | .46
Mms: 280g | 290g
Cms: 0.13mm/N | 0.13mm/N
Sd: 1210cm^2 | 1210cm^2
Vas: 169.7 l | 169.7 l
Spl: 92.5dB 1W/1m | 92.6dB 1W/1m
Bl: 12.8 N/A | 19.0 N/A
Xmax: 21mm
Rms: 1000W *
Sealed box: N/A cuft
Ported box: 5-10 cuft @ 30-37Hz
Sub OD: 18.500”
Cut ID: 16.750”
Mounting depth: 9.750”
Displacement: 0.23cuft

People aren't going to make detailed box plans for you, at least not for free. I suggest doing some reading of the stickies in the enclosure design forum. There is a topic that explains in great detail how to calculate every measurement of a ported box.

04-22-2007, 12:06 PM
ok i designed my box with the Re Lport software and i am planning on putting the sub on top and the port in the front.......the top piece is 19'' wide.....will that be enough for the 16.75 cut out hole and then mounting????

04-22-2007, 12:38 PM
yes, 19 will be fine.

04-22-2007, 12:41 PM
ok just makin sure?? thanks