2 18 Inch Subwoofers | Box Build + Demo 

Nice build...only things I would suggest is round over all internal parts... Ports, braces, bottom of speaker cut outs max output is efficient use of energy and air flow... more bracing never hurts flexing eats output..but super attaching enclosure to vehicle is so important....👍

Damn this is the box I was wanting with 2 18s. But I need to transfer some space inside the box for mines to fix. Box has to be a little longer. 40" l front to back, 38" w driver to passenger side. I want my port to come up that back wall and out the top back wall like a snorkeling type port

That’s awesome

That's a nice build. You think you'll do all the electrical upgrades in the future? Would definitely make a huge difference.

Nice

That port brace down the middle might make it act like it's 2 ports, you should put the measurements in as 2 ports to see if the tuning is the same as if it was 1. It's slaps regardless though

thanks for all the info including the numbers....and the truth about your system....ty from the car audio community.....what do you think you would have changed if you could go back and redo anything.....also what size was the length and opening size of your port....the box design for my 2 x18v3 apparently is 5.15" wide x 46.5 high and 27.5 inches long.....yours seems smaller and shorter

Silicon is better than wood glue it offers added dampening at that also

Looking good

Only thing I'ma say is becareful with the garage closed and all that mdf in the air. I learned very expensively that even tho I was wearing a respirator I could LACERATE my eyeball rubbing it from the dust! Nice build

It should be hitting a lot louder than that. That box isn't tuned. Looks like it needs a wall in the inside to separate the huge port.

Nice, what are the outside dimensions? Length width height?

i want to build exactly a box like this because it fits my car best, i have 2 15s and have mocked up an enclosure on a program but the port is on the front panel beside the subwoofers like your typical sub box, but how will i make the port for this kind of box, does the port need to be 2x smaller because the wall is 2x longer than the original one in the program?

I need a box like this for 2 12s

Nice int of box though a longer port I'd think but ya ain't me n I'm talking from my couch how's the sq?

Id also really like to know the port size

Did you try facing them backwards more clear an you can hear the notes carry at least the port is up against the hatch making port load but still a divider would help each sub needs its own chamber where you put them braces should have been a divider so the subs don't beat against one another

Beating Hard asf

Where did you get your box design? Whats the port width , height and length ?

Really nice box, wanna come make one like it for me so I can ditch my prefab and buy another 18"? :P

You'll need to increase the internal air space to about 18 cubic feet total, I found that a typical 18" subwoofer needs about 9 cubes to perform well, the type of amplifier and power supply has alot to do with how the box sounds, and that AudioControl epicenter maybe helpful in SQ

Can u tell me soecs on that i like that box amd whats tuning sir 💪🏼🔥🔥🔊

So when did these pieces of wood come with pre drilled screw holes?

Fancy hole punch ya using on Thad cardboard wood lol is nice but took too long f that

Good stuff sir, how long did it take you to build this?

So much glue for the baffle. That ain't going no where.

I want to build a box like this wat the dimension

1 inch mdf?

What's the fs of a sub n the vas I assume is at 5cuft per ported. See tuning the box to 27 and if a subs fs isn't the same 27 or less either way your roll off is from port area not loading correctly only holds ground if the subs fs is under 27 if not ur stuck like chuck damn near straight drop under the 27 ish mark. Seal those ports see if it helps grab deep or not seem so boomy or as much like bandpass box. What's the total q of the woofer it's shown as qts spec over 0.55 qts n higher it needs ported .54 n under say to .45 is either ported n or sealed under .40 demands sealed n volume of box toyed with very very little I was shocked with a psi platform 4 18 I have here. Turns out sealed box of 5.5 cuft is horrible on her but 3.5 sealed she's a dirty nasty low lil wonder. Besides it looks like they're starved for x max n serious power jump like 4 x what they get in the video one of them should crest 150 no less than 147 solid 147 at that.

Must be serious to wear a respirator the whole build

I would have put the sub at the opposite end away from the port to have more space to move air ...but thats my opinion....lol

SMD is jealous AF