Possible custom box- UPDATE 21/04

[Shaun1982]

Right guys me & my dad just knocked this up quickly.

 

 

Question is before i decide to make it how do i work out the volume of it being a weird shape? My sub needs 24.9 litres minimum

[ikarus]

If you take a few measurements you could knock it up in a cad model and get the volume that way? Looks to me like you have way more volume than you need, you going to port the enclosure?

[Shaun1982]

I was going to leave it sealed ikarus, the max kicker say on their site is 2.0 cubic feet,my dad split it down on paper with the measurements weve got and got it to 2.0,but were not sure if thats right as we dont know a thing about calculating volume lol

 

Heres a childs attempt at showing the sizes

 

[DoogyRev]

If you work out the volume in cm then just divide by 1000 will give you litres.......

 

Lenght X Width X Depth in centimetres divided by 1000

 

so........if you had a Container measuring 8cm X 8cm X 6cm = 384 cm3 which is .384Litres

 

Split your box in to separate containers work out the volume of each and add together... simples

[Shaun1982]

Sooo i should just be under its max sealed volume then at 54.something litres if the calculations are correct

[DoogyRev]

At a rough calculation I reckon that about 80-85 litres... ish

[Shaun1982]

dad reckoned he got it worked out to nearly 55,80+ is waaayyyy too big,mind you the current box for the sub is the same size as a double 12 box

[DoogyRev]

Just drawn it out for a more accurate rough calculation and I get 71 +/- a max of 10 litres

[Shaun1982]

Thanks matey, do you know what downsides there will be on having a bigger box than needed?

[DoogyRev]

Thanks matey, do you know what downsides there will be on having a bigger box than needed?

 

Sorry chap, can't help you there..... I know a bit about mathematics and bugger all about sub's and boxes

 

Looks good though, will be keeping an eye out on your progress

[Shaun1982]

Lol, see im useless at maths Ill hopefully start it tomorow. There will be a big amp on a false floor with another false floor to cover it. basically ive robbed zenclosures idea

 

http://www.zenclosures.com/ProductDetai ... Code=Z112U

[rich5259]

looks to be about 75 litres to me - that's 2.6 cubic feet

 

so you want about 57 litres

[Shaun1982]

between 24.9 & 55.6 the site says Rich

[rich5259]

44x23x54 = 54.6 litres if that helps

[Shaun1982]

Means nothin to me rich

[ikarus]

At a rough calculation I reckon that about 80-85 litres... ish

 

Good rough calc fella, i just modelled this in cad, works out at 78.07 ltr.

 

If you want a volume of 24.9 ltr, with that profile you would only need a width of approx 17cm. For a sealed box think way smaller - or more subs.

 

What sub are you going to use, with that volume i'd go ported not sealed and tune the box lower (actually i did) - you will get lower bass from a larger box if it's tubed right. I run an 82 litre twin ported box in the rear hatch and it tunes to 24.08 Hz. Way lower than you will get out of a sealed box. Depends what you want from it really?

 

Hope this helped

[Shaun1982]

Hi Ikarus, i knew youd be good for this

 

Right im using a 12'' square Kicker L7, that box was built that shape purely as i thought it needed a lot of space,like i say i was running it in a box the same size as a double 12 box in the fto.

If it helps i listen to all sorts really but 90% of the time its probably hip hop & r&b,ive also only ever had sealed boxes so i wouldnt know what they sound like running the same type of music.

I suppose there would be no harm in making the box narrower as itl be hidden by a fascia anyway,unless it would be easier,and viable to lose the extra space off the back instead?

[ikarus]

Hi Ikarus, i knew youd be good for this

 

Right im using a 12'' square Kicker L7, that box was built that shape purely as i thought it needed a lot of space,like i say i was running it in a box the same size as a double 12 box in the fto.

If it helps i listen to all sorts really but 90% of the time its probably hip hop & r&b,ive also only ever had sealed boxes so i wouldnt know what they sound like running the same type of music.

I suppose there would be no harm in making the box narrower as itl be hidden by a fascia anyway,unless it would be easier,and viable to lose the extra space off the back instead?

 

90% of the time its probably hip hop & r&b

 

^ good man.

 

One question, what do want from it, pop or rumble (or a best fit compromise)?

 

Hip hop & r&b go both ways (if you know what i mean).

[Shaun1982]

Kinda a mix i guess dude, things like Elavator by Flo Rida have big drops where as things like B.O.B by Outkast beats shorter & harder so yeah all round for me if poss please

[DoogyRev]

Good rough calc fella, i just modelled this in cad, works out at 78.07 ltr.

 

and that was before I got the pen and paper out

[ikarus]

Kinda a mix i guess dude, things like Elavator by Flo Rida have big drops where as things like B.O.B by Outkast beats shorter & harder so yeah all round for me if poss please

 

^ yeah that's the tricky bit

 

In terms of hardware, are you looking to use what you have or put some new kit in? You seem ready to lose the spare wheel which is the fisrt step to super low bass..

[Shaun1982]

Ive not got that much left anymore ive got my Alpine D310rb to go back in,the kicker l7 & an Audiobahn a2200hct to power that.Ill have to buy some new comps & a little amp to power them.

With the box template as it is it leaves me enough room to get the amp(26''x12'') infront of the box on its own little floor in the spare wheel recess with a false floor above that

[ikarus]

That amp has some power dude. A sealed 12 powered can punch pretty well with the right power. Have you modelled anything in BBP or WinISD ?

[Shaun1982]

Yeah it will run two of these

 

In what now? i just went out with dad,measured bits then made the awesomeness that is the cardboard template

[IanS16]

My build isn't a custom box and was done on a mid-low budget but it looks as though we are doing the same sort of thing. At least you get an idea of how the sunken box looks

 

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