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View Full Version : Where Does The Sub Actually Go?



spitfirees20
03-19-2006, 07:56 PM
I'm building a ported enclosure, but I'm kind of confused. Where should the sub be placed in relation to the port? Here are my options, keep in mind these are from a top view of the enclosure:

Option 1:
http://img90.imageshack.us/img90/5179/sub9uj.th.gif (http://img90.imageshack.us/my.php?image=sub9uj.gif)

Option 2:
http://img394.imageshack.us/img394/386/sub21qm.th.gif (http://img394.imageshack.us/my.php?image=sub21qm.gif)

Option 3:
http://img63.imageshack.us/img63/3615/sub35oy.th.gif (http://img63.imageshack.us/my.php?image=sub35oy.gif)

Which one of these should I do?

Rattlebrain
03-19-2006, 07:57 PM
IMO option 3 but I really don't think it matters

southstylestang
03-19-2006, 07:58 PM
Im not real sure b/c im a noob but i read somewhere that you need at least 2" clearance from the sub and those first 2 pics looks like your not going to have 2" clearance from the back of the sub. I might be wrong tho.

Ctminime
03-19-2006, 08:02 PM
Im not real sure b/c im a noob but i read somewhere that you need at least 2" clearance from the sub and those first 2 pics looks like your not going to have 2" clearance from the back of the sub. I might be wrong tho.

i dont think the sizes made in the pics are acurate to the actual sub/enclosure...

spitfirees20
03-19-2006, 08:04 PM
Well, actually they're pretty close. When the sub gets in the enclosure, it's back would be less than an inch away from the port wall, so options 1 and 2 represent my problem.

PowerNaudio
03-19-2006, 09:26 PM
i would say box one , that way the sub is not trying to force the air out of the port. but pressurising the enclosure to where air is forced in and out of the port.

what is the diameter of the vent hole on the back of the speaker?
if its one inch in diameter, i suggest you keep the sub one inch away from the port wall.

southstylestang
03-19-2006, 09:33 PM
i would say box one , that way the sub is not trying to force the air out of the port. but pressurising the enclosure to where air is forced in and out of the port.

what is the diameter of the vent hole on the back of the speaker?
if its one inch in diameter, i suggest you keep the sub one inch away from the port wall.


Not being a ******** but is that what you suggest or is that the rule of thumb here. I read just 2" and thought that was kinda a rule for all subs. Just curious tho. And this will kinda help me decide on my next subs and if im for sure going to use the box I want.

spitfirees20
03-19-2006, 09:57 PM
Yeah, the hole on the back of the sub is a little over an inch. So I guess I'm going with plan c, will that significantly affect how the sub sounds / volume?

Pop da Hatch
03-19-2006, 10:09 PM
Option 1 ftw...........

JL12W7INAGS300
03-19-2006, 10:10 PM
why not mount the sub up top so you have a sub facing up and a port facing towards the side? that may work?

spitfirees20
03-19-2006, 10:13 PM
Can't fit, it's a 15" and the distance between the port wall and the enclosure wall is 8.25". Is plan C really that bad?

saywhat?
03-19-2006, 10:15 PM
ur sub wont have the control it could have if u do it as number 3. number one and 2 will give the sub more control.

spitfirees20
03-19-2006, 10:17 PM
son of a *****, i ****ing hate building boxes because they always come out all ****ed up like this. So it's too close to the port wall, yet I can't put it on the end because there is no sub control.... ****ing great. ****ing fantastic. I ****ing hate this ****ing **** every ****ing time I try a ported enclosure it comes out FUBAR up the mother ****ing ***. **** this ****, seems like i'm ****ing out of options.

JL12W7INAGS300
03-19-2006, 10:22 PM
son of a *****, i ****ing hate building boxes because they always come out all ****ed up like this. So it's too close to the port wall, yet I can't put it on the end because there is no sub control.... ****ing great. ****ing fantastic. I ****ing hate this ****ing **** every ****ing time I try a ported enclosure it comes out FUBAR up the mother ****ing ***. **** this ****, seems like i'm ****ing out of options.


lol if you plan everything in advanced nothing like this will happen

southstylestang
03-19-2006, 10:24 PM
what is this box going in. if you are limited in room then try downsizing to 12's or 10's or get some subs that aint so deep.

saywhat?
03-19-2006, 10:24 PM
yah, well JL12W7 will build a free ****** enclosure if you would like...

spitfirees20
03-19-2006, 10:27 PM
It's going into a cherokee, I have the room, and I'm not giving up my sx 15. But I don't feel like rebuliding the box. I don't care anymore, I've seen plenty of boxes like option c, I just wanted to know if it was any worse off.

southstylestang
03-19-2006, 10:29 PM
i would just put it in that box and wait about a week and build a bigger one. im sure JL12W7 could fix your box for you tho.

spitfirees20
03-19-2006, 10:47 PM
Alright, I'm going with option C and i'll see how it sounds. I've looked through some other threads, and people have done the exact same thing, so I think i'm over-worrying.

PepsiFiend69
03-19-2006, 10:49 PM
mount it inverted....those SX's have **** baskets



666th post


satan FTW

Odd-io
03-19-2006, 10:51 PM
mount it inverted....those SX's have **** baskets



666th post


satan FTW

In this case...inverted ftw. w00t :veryhapp:

azbass
03-19-2006, 10:52 PM
real man dont run subs in a box.

spitfirees20
03-19-2006, 10:53 PM
My amp doesn't have the phase **** or whatever to do it inverted.

PepsiFiend69
03-19-2006, 10:55 PM
My amp doesn't have the phase **** or whatever to do it inverted.

then you just wire positive to negative. thats all the phase thing does anyways, is just switches the polarity


correct me if im wrong..but i dont even think it matters?

spitfirees20
03-19-2006, 11:00 PM
This *****.

bibby
03-19-2006, 11:03 PM
Inverted option 1 FTW, for sure!

Odd-io
03-19-2006, 11:06 PM
then you just wire positive to negative. thats all the phase thing does anyways, is just switches the polarity


correct me if im wrong..but i dont even think it matters?


You are very correct.

Hook the positive on the amp to the negative on the sub, negative on amp to positive on sub. [Martin Yan voice]So shimpo![/Martin Yan voice]

MetalHead888
03-19-2006, 11:07 PM
you could always rip the port out and seal it....for now

PepsiFiend69
03-19-2006, 11:11 PM
double baffle the front for another 3/4 of an inch, and then mount the sub on another round baffle around the rim of the sub for another 3/4"...that should give you enough room, might look a little akward, but it'd probobly work, just make sure you seal it up good.


IDK, i still say invert it, RE's look sooo good inverted IMO


Planning out boxes > you


it's cool...my ported boxes come out ****** too.

JL12W7INAGS300
03-19-2006, 11:23 PM
yeahh try to do it inverted

tRiGgEr
03-19-2006, 11:40 PM
Sub control :laugh:

phantom240
03-19-2006, 11:47 PM
inverted option1 ftw!

Bolognablake
03-19-2006, 11:58 PM
This *****.

Hey, just mount the sub inverted.

Wire it normaly.

spitfirees20
03-20-2006, 03:16 PM
That's what I plan on doing, just mounting it inverted in option one, wiring it normally, and having the port and sub facing up. It's just i've never, ever dealt with inverted subs, so I hope it sounds just as good and loud.

PepsiFiend69
03-20-2006, 04:56 PM
it will sound exactly the same, plus you get like .25 of a foot more box space due to there being no sub displacement.

tRiGgEr
03-20-2006, 05:15 PM
it will sound exactly the same, plus you get like .25 of a foot more box space due to there being no sub displacement.

No it wont. Inverting increases enclosure space, changing the tuning and drivers response curve.

In most instances inverting has led to a single decibel loss on the meter. As long as this is a daily driver not a SPL install, that's one thing you will not have to worry about.

JL12W7INAGS300
03-20-2006, 06:06 PM
one decibel? thats not even noticable. Id say go wid it

saywhat?
03-20-2006, 06:19 PM
Sub control :laugh:


laugh all you want, if u knew anything you would know what i said does take effect at one point or another. dont know about with his box, but with higher app. setups its a good factor to look at when planning.

saywhat?
03-20-2006, 06:20 PM
No it wont. Inverting increases enclosure space, changing the tuning and drivers response curve.

In most instances inverting has led to a single decibel loss on the meter. As long as this is a daily driver not a SPL install, that's one thing you will not have to worry about.


prove that there is a loss, ive seen plenty of setups meter the exact same.

TypeRBass
03-20-2006, 06:23 PM
one decibel? thats not even noticable. Id say go wid it
actually 1 dB is noticeable...

saywhat?
03-20-2006, 06:25 PM
actually 1 dB is noticeable...

if u have listened and tested plenty it is, i would notice it in most systems with a before and after.



3 db is TWICE AS LOUD, doesnt mean a single db isnt noticeable.

spitfirees20
03-20-2006, 06:50 PM
Actually, I think the box was made not taking into account sub displacement, as it was a box plan in the sticky and how can the box take sub displacement into account if any sub can be used in it? If anything, I think now I'll have a pure 3.5 cube enclosure tuned to a real 32 hz.

mazdakid
03-20-2006, 07:13 PM
[QUOTE=PepsiFiend69]double baffle the front for another 3/4 of an inch, and then mount the sub on another round baffle around the rim of the sub for another 3/4"...that should give you enough room, might look a little akward, but it'd probobly work, just make sure you seal it up good.


what i was gonna say

spitfirees20
03-20-2006, 07:19 PM
I think I'm just gonna invert it, no one else I know has that. Anybody have any pics of an SX or SE or XXX inverted, just so I would get an idea of what it looks like?

PowerNaudio
03-20-2006, 10:01 PM
if you have the tools to make 2 rings out of 3/4" mdf to raise the sub an extra 1.5", then go with enclosure number one.

the reason i said before if the port hole on the back plate of the sub is 1" in diameter, then youll need 1" of clearance from the back wall is so that the wall does not restrict the subs air flow or cooling, its a 1 to 1 ratio "as a minimum". so if you got a 2" diameter hole on the back plate, then make sure that you have at least a minimum of 2" of clearance from the back wall.

make the rings, raise the sub to clear the 2" or more and call it a day.

or just go inverted.

laters

spitfirees20
03-20-2006, 10:09 PM
It's about 2", and I don't have enough scraps for 2 MDF rings, so I'll try inverted. Are you against inverted?

PowerNaudio
03-20-2006, 10:19 PM
It's about 2", and I don't have enough scraps for 2 MDF rings, so I'll try inverted. Are you against inverted?

not in your case since you didn't design the enclosure with the subwoofer specifications in mind, you don't know how its going to sound in ether position. so go for it.

spitfirees20
03-20-2006, 10:29 PM
Oh, and thanks whoever gave me some negative feedback. I take this forum's advice, try to build an enclosure, screw up, and get mad. Then I get negative feedback for "cursing", which isn't even cursing anyways, it's just a bunch of *'s. I made a whole other thread, and people said this enclosure was ok for my sub, and then I build it and it doesn't fit. I thought I did plan, my mistake was I took people's advice who didn't know what the hell they were talking about.

imaspaceguy90
03-20-2006, 10:33 PM
ii choose a

southstylestang
03-20-2006, 10:39 PM
i would see if you could find a small piece of scrap wood and make a spacer for the sub and then do inverted. try both and see which one sounds better. my sub doesnt have enough clearence from the back of the sub to the box either. but it sounds better that way then inverted. i did make a spacer to help a lil bit tho but the box isnt sealed and has air leaks. but it was just a set up to get me buy till i built a box and the day i was gonna build my box i decided to put my car up for sale and now im chaning my mind on subs. so sometimes plans get fuked up. no biggie.

PV Audio
03-20-2006, 10:43 PM
A subwoofer doesn't know physics, and it doesn't know where the air is either. It really does not matter, but try for three inches from the rear of the speaker.

PowerNaudio
03-20-2006, 11:16 PM
A subwoofer doesn't know physics, and it doesn't know where the air is either. It really does not matter.

and thats why is up to the enclosure designer to put the sub in a properly designed enclosure! to keep that dumb speaker from sounding like crap or getting destroyed.
lol.

PV Audio
03-21-2006, 07:38 PM
I agree wholeheartedly.