First build, 2Cu Ft.@ 27 Hz

[DDSC 10+ year member]

Is that going to give me strong lows AND tight response

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[spoonraker 10+ year member]

Assuming it's for a single sub, probably a 12'' I'm guessing? Yes, should get nice and low, sound good, but have decent output.

 

[phyphoestilic 5,000+ posts]

Tuning below 28hz in a car audio application is just overkill. I'd say 28-30hz is fine if ur looking for some low end output.

 

[spoonraker 10+ year member]

He wants to communicate with elephants obviously

 

[mazdakid 5,000+ posts]

thats pretty low for a 12, what kind of sub is it?

 

[helotaxi 5,000+ posts]

It all depends on the sub. Tuning some subs that low will create a shelf in the low end response and cost total output and usually have pretty nasty group delay as well. Tuning other to that freq is actually higher than the sub wants leading to a large hump in the response that is exaggerated by the car's transfer function. The result is that the low bass is pretty overbearing.

 

[DDSC 10+ year member]

Its a Audiobahn Immortal, I finished the ox last night or shall I say this morning (ran into some problems). If I put glue in the joints of the box (the corners) should I still use silicone or will it be fine like that. also how long do you guys let your boxes sit to dry before you hookem up. The glue bottle said wait 24 hrs befor putting stress on the joints but I've got screws every 2"

 

[jellyfish420 10+ year member]

screws every 2" is not only overkill...but its actually bad for the box. the only purpose of the screws is to hold it untill the glue dries. i usually do every 5-6". to prove a point i've built boxes, then after the glue dries, remove every screw. the glued joint is actually stronger than the rest of the wood. i usually hook em up as soon as i'm done //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

i guess you missed my last post in your other thread. i recommended 33hz.

 

[DDSC 10+ year member]

I was thinking about that well, at least it LOOKS like fort knox=). Ill remeber that for the next box, which should be next week for 2 12's

 

[Fattony911 10+ year member]

screws every 2" is not only overkill...but its actually bad for the box. the only purpose of the screws is to hold it untill the glue dries. i usually do every 5-6". to prove a point i've built boxes, then after the glue dries, remove every screw. the glued joint is actually stronger than the rest of the wood. i usually hook em up as soon as i'm done //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gifi guess you missed my last post in your other thread. i recommended 33hz.

x a gajillion, i also make most of my boxes screwless now because of this, not to mention it looks sexy like one peice of wood

 

[PV Audio 5,000+ posts]

Everything in this thread here is pretty much true. You don't need to tune that low in an automotive environment for two reasons: first, there isn't that much low information in music, and more importantly, a phenomenon called cabin gain allows your vehicle to "boost" the output of the bass notes already. Also, 4" or more spacing is fine on screws. Hell, on home audio speakers, I space every 8"...if at all.

 

[DDSC 10+ year member]

well I ended up doing 2.5 Cu Ft. at 28 hz just got the thing hooked up and took it around the block **** I can feel the lows in my throat like crazy. I lost a little on the upper end but thats ok cause the Immortal hits the highs harder anyway but ****, I set off my first car alarm with that sub, or any single sub for that matter. I dont think I'll every buy a prefab box again. Now Im wondering what size I should I should make the box for the 2 12's I got on the way, as you will see that one box at 2.5 cubes its taking all the space in the trunk up. If I make one the same size and tuning will it sound the same just louder???

Anyway enough of that, on to the pics.

 

[DDSC 10+ year member]

Results of my trip to the store, that circular saw was only 37 dollars at lowes or home depot:yumyum:

The old prefab box......//content.invisioncic.com/y282845/emoticons/zzzzz.gif.06fa1eabe00c8b872d7e814474c9b95c.gif

Side by side along with my new 8 gauge speaker wire

I got King Kong in da trunk!!!!!

2 24" clamp ghetto rigged to make one big one, those are 4 dollars each at harbour freight.

Gotta make sure everything fits up right before I start screwin

You cant tell from here but the end of the port wall got sanded to round the edges off a bit, I did it to the mouth of the port too but thats only in the pic when its in the car

 

[CrazedCat 10+ year member]

8 ga. for speaker wire...now THAT'S excessive

 

[jellyfish420 10+ year member]

what did i tell you? looking at the original box, you'd be lucky if that thing is 1 ft.

that looks like an 8ga amp kit, not speaker wire. going by your max dim. 37-18-16, i'd try this for you 2 12's...3ft at 35hz

http://img23.imageshack.us/my.php?image=3cubes35hz465sqin4wj.png