Aero port once more.

[robertoyoung08 10+ year member]

why so big? you realize thats more than 2x RE's recommended size?
http://reaudio.com/specs.html#sp_mx

yeah, re recommends 2.5 cubic feet for an mx.

but that seems way too small for such a huge sub.

but either way, minus sub displacement as well as the aeros.the 4.5 includes the subtraction of the wood displacement, but at the end of the build it will probably turn out smaller. its an odd shapped box so i dont even think the sub will see some the box

 

[snb778 5,000+ posts]

8" sounds about right... dunno if sub size matters at all with that amount of port

 

[robertoyoung08 10+ year member]

8" sounds about right... dunno if sub size matters at all with that amount of port

okay, 8" aero. bout how long?

il try psp, but idk if the numbers will come out right.

let me know what you think

thanks!

 

[perfecxionX 10+ year member]

yeah, re recommends 2.5 cubic feet for an mx. but that seems way too small for such a huge sub.

but either way, minus sub displacement as well as the aeros.the 4.5 includes the subtraction of the wood displacement, but at the end of the build it will probably turn out smaller. its an odd shapped box so i dont even think the sub will see some the box

so youve admitted that your new to this and dont really understand it, yet your ready to go so far against the manufacturers recommendations?

according to their website re recommends 2 cubes. you should do 2@33 with two 4" aeros. after displacement that will gross around 2.7 cubes

psp-inc's length calculator says that each 4" aero should be 29" long (if you actually give the port a 12" length the tuning will be at like 50hz)

is there a reason why you dont just do a slot port?

 

[robertoyoung08 10+ year member]

so youve admitted that your new to this and dont really understand it, yet your ready to go so far against the manufacturers recommendations?
according to their website re recommends 2 cubes. you should do 2@33 with two 4" aeros. after displacement that will gross around 2.7 cubes

psp-inc's length calculator says that each 4" aero should be 29" long (if you actually give the port a 12" length the tuning will be at like 50hz)

is there a reason why you dont just do a slot port?

yeah id be ready to drop the aero and do a slot with a quickness. except im trying to get the aero standing up height wise with the box so it can fire through where my stock sub was and get bass into cabin. otherwise too much of it is retained in the trunk.

im not new at car audio, just completely new at aeros so its confusing as hell for me.

with that being said, im going against the manufatures recomendations, because just like every other manufature, they recommend box sizes smaller than they should. re recomds like a cub and a half optimal for the xxx afterall, but just as caraudio magazine reviewed, they give smaller enclosure sizes to be conservative for people. 2.5 ft^3 seems decent enough as recommended by re audio, but after all displacements i should be okay i figure

 

[perfecxionX 10+ year member]

I think you'd be wrong to say that all, or even most, manufacturers recommend excessively small boxes. RE recommends 2.2 optimal for the xxx. and btw 2 cubes is a pretty standard size for a 12, so i wouldn't hesitate to trust their recommendations.

why do you think that a "huge sub" requires a huge box and port?

 

[robertoyoung08 10+ year member]

I think you'd be wrong to say that all, or even most, manufacturers recommend excessively small boxes. RE recommends 2.2 optimal for the xxx. and btw 2 cubes is a pretty standard size for a 12, so i wouldn't hesitate to trust their recommendations.
why do you think that a "huge sub" requires a huge box and port?

i dont mean any sub needs a big box.

and port size i wouldnt give my opinion on because i know that goes specifically by tunning.

well i guess i worded myself wrong, while i do think this sub is big, i wasnt trying to say any big sub needs a big box, im just trying to give it more space than what is recommended. i called re and they told me 2.5

i had the box measurements for exactly the box i wanted and the largest i can fit. it ended up being 4.3 and i figured id give it a try like that.

i am highly cosidering going down, but either way i still have the problem that i cant figure out the tunnin with aeros for any box size. so im stuck either way

 

[snb778 5,000+ posts]

3x 4" aeros 18" long.. tuned at 35hz.... done

 

[robertoyoung08 10+ year member]

3x 4" aeros 18" long.. tuned at 35hz.... done

you make it sound a lot easier than it actually is for me

and thanks, only thing now is that my box height is only 14 inches. so those 18"s definitely would not fit

 

[perfecxionX 10+ year member]

 

[snb778 5,000+ posts]

you make it sound a lot easier than it actually is for me
and thanks, only thing now is that my box height is only 14 inches. so those 18"s definitely would not fit

should never port out the top of the box... go out either side, or the back

 

[robertoyoung08 10+ year member]

so youve admitted that your new to this and dont really understand it, yet your ready to go so far against the manufacturers recommendations?
according to their website re recommends 2 cubes. you should do 2@33 with two 4" aeros. after displacement that will gross around 2.7 cubes

psp-inc's length calculator says that each 4" aero should be 29" long (if you actually give the port a 12" length the tuning will be at like 50hz)

is there a reason why you dont just do a slot port?

ooh by the way, i would like to know why you say that if i use two 4" aeros at about 12" length it would be 50hz tunning. i got those number right from psp. unless you did the math on your own. but i dont see why psps numbers come out different.

 

[robertoyoung08 10+ year member]

should never port out the top of the box... go out either side, or the back

why do suggest i shouldnt port out the top of the box?

 

[snb778 5,000+ posts]

you want the port to be the ports diameter away from the closest side-wall... you'd be limited to about 10" length for each port... wouldnt work...

and B... nobody does it because it doesnt give optimum results

 

[robertoyoung08 10+ year member]

well the whole point of me putting the aero was cus of how i want the box.

if i cant put the aero upwards then its not useful for me. id just make the slot port. i cant make a slot port in the middle of the box, which is wehre i want the aero to be.