07 18" RE XXX; sealed box recommended, RE says NO

[Immacomputer 10+ year member]

IB = Infinite Baffle; that means the sub has no air spring on it like it does in a sealed enclosure and there is nothing for it to load off of.

Making a large sealed enclosure isn't going to limit the amount of songs that sound nice. In fact, MORE songs will sound better on it because of the flatter frequency response. Will it still be loud? Hell yes; it's a ****ing 18" sub with 2" linear throw one way... with enough power, it will be loud and it will move some serious air. Will it meter high? Maybe... but it will sure as hell be loud to the ears.

I don't understand why you haven't just plugged the port on your current enclosure to see if you like the sound. You said it was in around 6 cubes after port so it will probably be close to 7 cubes if you seal it up. All you have to do is take a small piece of scrap wood and screw it over the port. You could stuff the shit out of it with towels even to just give you an idea.

Why don't you try that first since you're going to be dropping a lot of money on an enclosure. It will give you a ton more info than what you can get from us saying things that you don't understand and getting mixed views from all over the place.

 

[BreakingBad]

IB = Infinite Baffle; that means the sub has no air spring on it like it does in a sealed enclosure and there is nothing for it to load off of.
Making a large sealed enclosure isn't going to limit the amount of songs that sound nice. In fact, MORE songs will sound better on it because of the flatter frequency response. Will it still be loud? Hell yes; it's a ****ing 18" sub with 2" linear throw one way... with enough power, it will be loud and it will move some serious air. Will it meter high? Maybe... but it will sure as hell be loud to the ears.

I don't understand why you haven't just plugged the port on your current enclosure to see if you like the sound. You said it was in around 6 cubes after port so it will probably be close to 7 cubes if you seal it up. All you have to do is take a small piece of scrap wood and screw it over the port. You could stuff the shit out of it with towels even to just give you an idea.

Why don't you try that first since you're going to be dropping a lot of money on an enclosure. It will give you a ton more info than what you can get from us saying things that you don't understand and getting mixed views from all over the place.

well the box was a custom design to fit a back of a grand prix, and the way it was designed it wouldnt stand up straight.. box is gone.

i trust what you guys say, its just that i get one opinion, then someone comes and says that opinion isn't good or i have a better plan, and im just trying to get something concrete to go by.

so it seems as if ported won't be the best option since then you have to have a huge box, then the notes become very peaky and some songs won't have a better response, etc..

so if i'm correct..

ported might get LOUDER in general, but sealed with have a MUCH better SQ, go lower in general and also hit a range of notes better than a ported... ?

now when you say "flatter" response...

what exactly do you mean?

also, going from say 5 cubes to 8... how will that effect the frequency response aside from going lower? will "punchy" songs sound better in an 8 cube or a 5 cube box? by punchy i mean something like walk it out, lean wit it, ridin rims, etc.

 

[SQBubble 10+ year member]

power handling will suffer with larger enclosures.

x2, and mechanical handling also

 

[Kyle_Keating 10+ year member]

well the box was a custom design to fit a back of a grand prix, and the way it was designed it wouldnt stand up straight.. box is gone.
i trust what you guys say, its just that i get one opinion, then someone comes and says that opinion isn't good or i have a better plan, and im just trying to get something concrete to go by.

so it seems as if ported won't be the best option since then you have to have a huge box, then the notes become very peaky and some songs won't have a better response, etc..

so if i'm correct..

ported might get LOUDER in general, but sealed with have a MUCH better SQ, go lower in general and also hit a range of notes better than a ported... ?

now when you say "flatter" response...

what exactly do you mean?

also, going from say 5 cubes to 8... how will that effect the frequency response aside from going lower? will "punchy" songs sound better in an 8 cube or a 5 cube box? by punchy i mean something like walk it out, lean wit it, ridin rims, etc.

flat means, it plays all frequencies it can, as flat as possible giving the same input stimulus or voltage in this case.

if your subwoofer is not flat, then its going to artificially place higher or lower SPL at arbitrary frequencies that will not benefit any type of input. This is non-linear and inappropriate for good sound no matter what type of music it is. In other words, regardless of the type of music, if you're subwoofer is NOT flat, then you wont hear what the artist intended. They don't record their music in cars, they record them in studios that generally have very flat response and heavy acoustic treatment because thats what is considered reference.

5 cubes to 8 cubes sealed box is not going to make much of a difference at all.

Like I said, sealed is simple, and this driver can go into a sealed box without EQ which is a nice because I doubt you're going to put an active EQ on this thing... no one ever does in car audio.

 

[BreakingBad]

5 cubes to 8 cubes sealed box is not going to make much of a difference at all.

immacomputer... any input on this?

kyle, i'm definately following what you are saying, but again...an example... you are saying there will be not much of a noticable difference 5cu to 8cu. immacomputer though has previously said the larger the box, the thicker the low end... so going from 5 to 8 won't increase my low end??

 

[dB Dom 10+ year member]

How much you pay for this 18 XXX?

 

[BreakingBad]

How much you pay for this 18 XXX?

1250 shipped

 

[Macklessdaddy 10+ year member]

1250 shipped

wowwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww.

.

 

[BreakingBad]

wowwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww.


.

yep. i know. better than the MSRP of 2,200 though. literally half off.

and i can almost bet when fully powered and put in the right enclosure, this sub will be ****ing amazing.

 

[BreakingBad]

so i think the general consesus is sealed box, but now the question is... 5 cubes vs 8 cubes, what will the difference be, and is it worth the extra size?

 

[SQBubble 10+ year member]

so i think the general consesus is sealed box, but now the question is... 5 cubes vs 8 cubes, what will the difference be, and is it worth the extra size?

go with 5cu.ft.

look , ill tell you the difference right now.

if you go 8cu.ft, you will have awsome low-end and lack higher bass lines (youll still hear them and they will be nice but not as much as 5cu.ft)... and you'll reach mechanical limit easier than 5cu.ft and power handling would be less .

now with 5cu.ft, you'll have less low-end but not LOT less.... in ANY ways, its in a car, and the low-end gain that you get cuz of the cabin IS amazing.... so... basically, if you go with 5cu.ft, the cabin gain will help boosting the lows and you will have nice high bass lines unlike the 8cu.ft that would give you only have monsterous lows and honestly its really nice and exciting for the first week but then youll miss the highs...........

do a 5.cu.ft

/

 

[audioholic 5,000+ posts]

x2, and mechanical handling also

Mechanical handling also? Try, mechanical handling only. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif Im confident thats what dbfan meant.
Also note, with that sub's extreme excursion capability, reaching its mechanical limits would likely be no small task. If when done, would be mighty impressive.

 

[newusername 10+ year member]

You put the coil in serious trouble before you approach mechanical limits...it just has a ton of throw with relatively low efficiency.

Like I said in the previous thread, you want anywhere from 4-10 cubic feet. Once you pass about 5-6 feet, you're looking at incrementally smaller differences as you increase enclosure size. Understand that the lower you go, the more excursion you utilize and the fatter your bottom end will be. If you wish to use all the throw the driver is capable of, go 10 cubic feet sealed or larger and enjoy a huge bottom end. If you want to match the driver to your cabin the best, look at around 5 cubic feet.

 

[BreakingBad]

ok bang. done. 5 cubic feet it is.

being that its in a trailblazer, that alone will help reproduce the bass a lot better than in a car.

i would love to have a low end monster, but honestly... the music coming out now a days varies wayy too much to have a box built STRICTLY for super-low end stuff.

you got songs that range from say, Patron (joc) to Ridin Dirty (cham) where the bass line is really high.

but here's the new plan:

- 300 amp iraggi alt

- 5 cube sealed box (after displacement i take it?)

- SAZ-3000d amp

that right there should be one sick *** system.

 

[BreakingBad]

also,

for the guy who will be building my box...

any information i should provide to him aside from this:

Mounting Depth - 14.75”

Mounting Hole Diameter - 17.375”

Overall Diameter - 19”

Bolt Hole Circle - 18.25”

Motor Width - 10.5”

Motor Depth - 5”

Basket Depth - 9.75”

Displacement - 0.30 cu. ft.

Weight - 78 lbs.