Im chasing a sub box for my 2 x 12" 300WRMS each subs, and Ive found the dimensions recomended off the website. It says the enclosure volume should be 42.5 L or 1.5 Cubic Foot per sub. I was wondering a few things. I understand the box plays a HUGE role in the preformance of the sub, so I got 600WRMS total cause I figured that it could produce enough doof that I wouldnt need a ported box, so i could retain some quality at the expence of volumewhichI dont need casue I got fairly large subs.... if that makes any sence. Is this a good idea? Also, what thickness wood should the box be, Ive seen 12mm to 18 mm advertised, so I am guessing bigger is more solid and better? And whats the effects of differing from the recomended enclosure volume size and by how much before it becomes noticable? Any other tricks with boxing duals?

 

Addiction, you are lettin me down brother! What about that smart *** kid that always had something to say with the morbid fear of 6"x9"s who was on here a month ago... where did he go?

 

3/4" MDF is kind of the standard for thickness of your box....

by increasing the volume of your box you change the the overall response of the woofer..
for example a Diamond D9 12 has a perfect Q at .75 cubic feet. that means it will reproduce all your lower frequenceys very evenly....if you change your volume to lets say1.25 it will reproduce 40-hz more effiecntely
so there will be a bump in your response curve at 40-hz. so depending on what kind of music you listen to you can taylor your box and choice of sub to fit your needs...every sub likes a different enclosure some subs will have a perfect Q at 1.0 cubic feet just look at the specs of your sub to decide what sound you want..most of the time the recomended volume is gonna get you the closest to a perfct Q.

so usally by increasing the volume of your box you sacrifice nice tight bass for more low end response but a muddier sound..

i'm sure someone else can explain it better than me..( cough, addiction, cough )

 

DAMMMM sorry i dont live on this forum.LMFAO

well... if ya go ported the box TYPICALY is TWICE the size of a sealed box.... so if ya DONT wanna sacrifice that much space for the BASS... just go sealed...

and always use 3/4MDF... and wood glue, and either liquid nail or just silicone but liquid nail is what i use. predrill all the screw holes....

and if ya got a air nailer those things RULE!
i built my last box with only a few screws. speeds things up TONS cause predrilling all them screw holes sucks!!!!

 

ADDICTION! COME BACK HERE! IM NOT FINISHED WITH YOU YET! YOU DIDNT ANSWER MY QUESTION! lol. I listen to a variety of music; dance, rap, metal, punk, depending on the mood. So just get a box as close to the recommendations as possible? How much bigger is too much deviation. I have found a 18mm MDF (3/4") dual 12" box that is like 110L, and the subs are recommended to run on 85L, meaning the box is about 25%-30% bigger than recommended. Is this too much deviation? Or will this still have pretty good response. I still want my boot space, so its sealed FTW.

 

well sealed boxes are VERY FORGIVING! so if thats as close as you can find premade then just go with it...

or if ya think its realy a problem... just cut out some MDF to take up space inside the box to compensate..... but i dont see it worth the hassle... just glue and screw the extra material down so it doesnt move around and vibrate inside the box...

 

Sealed (Acoustic suspension) are definately the easiest and actually go lower in bass responce. The problem is you need double the watts to get the same dB as a ported box. Ported boxes are 3dB louder then sealed. But you can make the box MUCH smaller with sealed. Some 18" woofers work great even with 1-2 cu/ft. sealed boxes. Just make sure you have a very good mono class D sub amp.

 

Three things to read.

Number One

Number Two

Number Three

 

number ones the best!
BUY THE PROGRAM!!!!!!!!!
a GREAT box building program for a cut sheet print out!

only downfall about it is the picture on its program isnt up to scale... BUT a great cut sheet!!!!

 

was that 1.5 cu ft for a ported, or a sealed box per sub?

A well designed ported box is the way to go, but a sealed box is definatly much easier to build, and leaves you with the most room.

I have 2 10" clarions, which are rated for 350W RMS, and I have a monoblock 600W RMS amp driving them. I built two seperate, enclosed sub boxes

When I built my boxes, I made several prototypes, to see how small I could make them, and still have them sound good. I used one of the many online calculators, and the recommended size turned out to be (for a sealed enclosure) 1 cu ft.

The first box I made was half that, at .5cu ft. It was extremly loud and bassy, it sounded very fake, I couldn't really feel the bass as much though though, only hear it. and not very good at all, plus it made the amp and sub get very hot very quickly. I could hardly hear any bass at lower volumes. The next box was about .75 cu ft, it was less loud, the amp ran fine, but it still had a slightly unreal bass sound, It is hard to explain how it sounded, but it wasn't good. my fourth box was 1 foot exactly and it sounded perfect it was just as loud as the second, except the sound quality was very good. the bass could be felt much more than the half a foot box. I ended up building a 1.5 cu foot box after, and it was pretty cool, it didn't sound very loud, but it could make some stuff shake i tell you what!

I found that the difference in size seemed to make the sub have a reverse relation between sound and feel of bass, the recommended size being the most natural sound.

I ended up building my boxes approx .975 cubic feet, they sound awesome, even when the volume is low. they aren't really any different than the 1 cuft box. I would stick with the recommended size box, or pretty close to it if you are looking for sound quality.

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