sealed vs. ported boxes

ok...pretty self explanatory subject...is this prefference or does it depend on subs? let me know...
Joel

You have more control over what the subwoofer puts out in a ported box, it can be louder, or just set lower... Lots of factors. Sealed just plays what the sub is plays... not the loudest.

it's both preference and it depends on subs

ported = teh bestest!

I went with sealed to keep the box smaller and hopefully less noticable in the backseat. But ported does sound better IMO.

it depends on your preference, and depends on the sub, some subs cant play in a ported box(well they will be dammaged), but the reason for the sealed is to increase sound quality, now ported raises the db's somthing like 3 or 4, but is less sq oriented so it wont sound as crisp. so it gets louder. if you are building them yourself, i would reccomend sealed because they are much easier.or if you are haveing someone make it for you, have them make is ported so it gets louder.

ported doesn't effect sq that much in my opinion though, my friends bazooka tubes are ported, and they hit clean and low.

How exactly do you go about tuning ported and slot ported boxes? I've always heard to make the port the same length as your sub then there's people talking about my box is tuned to this exact number of Hz. Do I hae to get one of those programs to do it? Also how big are ports supposed to be in diameter for about 500 watts rms each for 2 12's?

port size is not based on the wattage sent to a subwoofer. You have to give us a frequency you want it tuned to for those 2 12"s, different companys suggest different frequencys. Most car audio shops, who like spl, suggest 34hz at about 3 cubic feet for any subwoofer(single). I would go to a local shop and they will draw up plans and build it for you if you do not want to go through the hassle of using a program etc.

it depends on the subs

me i have a vented bandpass box custom built by myself

and it knocks the box down

the reason why i chose to built a vented bandpass box is cuz its in a tahoe and with no trunk, there's no vibration.... and becuz its in a bandpass box its gon knock harder b/c its already in that glass

Bandpass sounds like shit though...

shitting me

gotta know what you doing

Yeah, well how many frequencies can you actually hear?

a properly built bandpass box CAN sound good, but:
1) they're very hard to get this perfect
2) you still won't get anywhere close to a flat response, it will look like someone turned up a bass boost at one frequency and left the rest normal, as opposed to a ported box tuned low that stays VERY flat down to the tuning freq where it drops off dramatically.

I haven't heard a bandpass that sounds good yet. Also out of ported and sealed..which is louder and which is deeper?

PORTED is louder and deeper if tuned that way.

ported is louder, by about 3dB
If the ported box is tuned low (<30Hz) it can be 6dB or more louder than a sealed box down low, however a sub's response in a ported box falls off VERY fast just after going below the tuning freq. So if you want it to hit low, tune around 25-30Hz and call it a day.

Basically, it's hard to say that a ported box gets deeper, since a sub in a sealed box can just keep going down and down with the output slowly reducing, while in a ported box it will stay relatively flat down to the tuning frequency and then die off fast. Generally speaking though, a low-tuned ported box will hit lower with MUCH more power behind it vs a sealed box, mixed with cabin gain the lowend (<35Hz) can sometimes be a little overbearing, but it's nothing a little tuning can't fix.

a properly built bandpass box CAN sound good, but:
1) they're very hard to get this perfect
2) you still won't get anywhere close to a flat response, it will look like someone turned up a bass boost at one frequency and left the rest normal, as opposed to a ported box tuned low that stays VERY flat down to the tuning freq where it drops off dramatically.



my box is vented as well as a custom bandpass box

Does your box use all freq from 100 down to about 20? what is the flatness of that like?

Does your box use all freq from 100 down to about 20? what is the flatness of that like?


a magician doesnt show his tricks


just know, my system knocks the block down, and prolly will out quake yours

:-x

haha You wish

a magician doesnt show his tricks


just know, my system knocks the block down, and prolly will out quake yours

:-x

haha, what do you hit?

what do i hit?


i can easily hit a 165


keyword, easily

so no, you wish, thx.

uh huh....
so how many amps and subs do you have?

Yeah..... My frequency respnse on my subs get down to 24 Hz I'm not experienced with tuning and ported boxes, but I was thinking about tuning around 28 Hz. What is the lowest frequencys in songs with really low bass do they ge all the way down to 20 Hz? And would it be okay to tune to 28 hz? Model is aw1251t.

Songs go below 20hz... I think that 29hz is more appropriate for your sub. It will then be infrasonic filtered at 24hz.

what do i hit?


i can easily hit a 165


keyword, easily

so no, you wish, thx.

What are you running? 165db is nice if you got that using a B&K mic at the dash. :sunglasse

Yeah..... My frequency respnse on my subs get down to 24 Hz I'm not experienced with tuning and ported boxes, but I was thinking about tuning around 28 Hz. What is the lowest frequencys in songs with really low bass do they ge all the way down to 20 Hz? And would it be okay to tune to 28 hz? Model is aw1251t.


Some rap does get as low as 20, but not much. I would tune around 25-30 if you want SQ, if you want more SPL then tune around 35. Either way you should get a SSF around 5Hz below tuning to keep the driver from unloading.

uh huh....
so how many amps and subs do you have?



why does it matter how many amps and subs do i have?


i hit a 165 using one speaker

and say im lying if you like

why are you here Jamaal?

See most people come to a forum to either learn from others or share their knowledge. You obviously aren't here to learn, since you think you know everything. You can't be here to share your knowledge since you're so damn scared someone will steal your "oh so precious" box design or audio setup so you don't say anything about them. And to top it all off you give out bad information to people who don't know better.

This person wants to know whether they should use a sealed or ported box and what the advantage of both are. You come in saying to do a bandpass box, yet you won't tell him how to do it, or anything about how you did it. You obviously have a SPL setup in your car, and if you have a single sub hitting 165 then it is impossible for it to actually play music and sound good in the box you have. So why in God's name are you recommending it to someone who obviously doesn't compete and just wants a normal DD setup?

Are you here just to brag? If you're trying to talk up your setup to win our undying glorification then you're in for a world of disappointment. Anyone with a credit card can go out and hit 165, single sub or not. All it takes is some sick deadening, a bigass sub on a lot of power, and a lot of time to try different boxes and see how they do.

Look, unless you're actually going to contribute to this forum in any way you're just wasting your time and ours. I'm not going to grovel at your feet, I'm not going to beg you for the blueprints of your box, I could care less what setup you have. Being so secretive about everything you have is just retarded IMO, good day sir.

why does it matter how many amps and subs do i have?


i hit a 165 using one speaker

and say im lying if you like

Post some pics of your set up. I'd like to see it.

why are you here Jamaal?

See most people come to a forum to either learn from others or share their knowledge. You obviously aren't here to learn, since you think you know everything. You can't be here to share your knowledge since you're so damn scared someone will steal your "oh so precious" box design or audio setup so you don't say anything about them. And to top it all off you give out bad information to people who don't know better.

This person wants to know whether they should use a sealed or ported box and what the advantage of both are. You come in saying to do a bandpass box, yet you won't tell him how to do it, or anything about how you did it. You obviously have a SPL setup in your car, and if you have a single sub hitting 165 then it is impossible for it to actually play music and sound good in the box you have. So why in God's name are you recommending it to someone who obviously doesn't compete and just wants a normal DD setup?

Are you here just to brag? If you're trying to talk up your setup to win our undying glorification then you're in for a world of disappointment. Anyone with a credit card can go out and hit 165, single sub or not. All it takes is some sick deadening, a bigass sub on a lot of power, and a lot of time to try different boxes and see how they do.

Look, unless you're actually going to contribute to this forum in any way you're just wasting your time and ours. I'm not going to grovel at your feet, I'm not going to beg you for the blueprints of your box, I could care less what setup you have. Being so secretive about everything you have is just retarded IMO, good day sir.

Yeah, I agree with you.

why are you here Jamaal?

See most people come to a forum to either learn from others or share their knowledge. You obviously aren't here to learn, since you think you know everything. You can't be here to share your knowledge since you're so damn scared someone will steal your "oh so precious" box design or audio setup so you don't say anything about them. And to top it all off you give out bad information to people who don't know better.

This person wants to know whether they should use a sealed or ported box and what the advantage of both are. You come in saying to do a bandpass box, yet you won't tell him how to do it, or anything about how you did it. You obviously have a SPL setup in your car, and if you have a single sub hitting 165 then it is impossible for it to actually play music and sound good in the box you have. So why in God's name are you recommending it to someone who obviously doesn't compete and just wants a normal DD setup?

Are you here just to brag? If you're trying to talk up your setup to win our undying glorification then you're in for a world of disappointment. Anyone with a credit card can go out and hit 165, single sub or not. All it takes is some sick deadening, a bigass sub on a lot of power, and a lot of time to try different boxes and see how they do.

Look, unless you're actually going to contribute to this forum in any way you're just wasting your time and ours. I'm not going to grovel at your feet, I'm not going to beg you for the blueprints of your box, I could care less what setup you have. Being so secretive about everything you have is just retarded IMO, good day sir.



smh first off........ you can suck my dick

second....reading is fundamental.....

-i never claimed that im not here to learn....nor did i claim that i know everything....so you can get the FAWK off my dick..... DONT assume b/c it will make the ass outta you that you truly are

-plz state which WRONG information that im giving out to the members on this forum

------------------------------

(this is where the reading is fundamental part comes in)
IF you actually read what the user posted....

he posted:

ok...pretty self explanatory subject...is this prefference or does it depend on subs? let me know...
Joel

thas what he posted, not whether they should use a sealed or ported box and the advantage of both are..... so there again... you can still suck my dick

-DID i say that my setup was that ONE SUB (let alone that sub in a bandpass box)? there you go assuming again....... what i said was that i have a speaker that can easily hit 165
and that is my SBX

so umm, since you sitting there bitching about my setup...... i will tell you

i have a total of 5 subs (3 8's under the second seat of my tahoe & 2 15's)

i have a total of 4 amps (2 for my subs and 2 for everything else)


i also have 2 alternators thas charging 4 batteries (1 for the car, 2 for the system, 1 for my airbags)


so um if you just wanted to know my setup you coulda just asked, since yall got smart with me, imma get smart wit yall... so um that dayum essay you just typed.... was worthless k?

Calm down man, there is no need to fight and keep the suck my **** to a minimal if not nonexistant. This is a forum for arguing, learning etc. Not for bashing and flaiming. We're all just a little pissed you are being a baby about a box we don't have proof that you have

Calm down man, there is no need to fight and keep the suck my **** to a minimal if not nonexistant. This is a forum for arguing, learning etc. Not for bashing and flaiming. We're all just a little pissed you are being a baby about a box we don't have proof that you have

im calm, i have no reason to get all wyled up on the inet, theres no purpose. i just simply responsed to his post. And why does my box have to be nonexistent just b/c i didnt post pics? THAT is what i dont understand

if this forum is for learning, why do the members of this forum jump down my throat about my setup......

OH i know why.... its becuz i dont have a pic go figures /sarcasm :rolleyes:

you're staying calm?
read my post
read yours
I rest my case

"so um if you just wanted to know my setup you coulda just asked"
uh huh...so thats why when we DID ask you, you gave us retarded, ambiguous answers that told us nothing. Try again

And if you hit 160 easy with one sub, I am pretty sure you would be one of the firsts, if not the only to do so

you're staying calm?
read my post
read yours
I rest my case

"so um if you just wanted to know my setup you coulda just asked"
uh huh...so thats why when we DID ask you, you gave us retarded, ambiguous answers that told us nothing. Try again


d00d whateva


yall got smart with me...... in return i got smart with yall. paint blank. if you cant take it, dont dish it.

anything else you have to say to me, make sure you come correct and i'll come correct, have a nice day.thx.

And if you hit 160 easy with one sub, I am pretty sure you would be one of the firsts, if not the only to do so



naw.... its easy

one of theses: http://www.kicker.com/ShowPage.cfm?filename=04SoloXSub.html&menu=SUBWOOFERS


with some memphis amps :cool:

right... Paint blank, LOL. So, where are you from, you have an interesting, what would you call it, dialect?

165db with an SBX, you sure it wasn't port war?

Loudest 10" sub hits 169db and it in an Extreme vehicle. Cemented all around, stripped out interior, wall, definitely not a driveable car anymore. In a regular automobile, its not possible. 160db is not easy (a legal 160 that is).

Even the SoloX has a hard time getting 160db unless it gets so much power and the box is rediculously big. Its not easy to get 160db. If you want confirmation, you can talk to my friend Tracy over at Kicker. I'm sure if he works at Kicker, he should at least know something about it.

Congratulation, you have done something most of the top SPL competitors struggle to do.

My friend has the record (NSPL) for his class using 2 12" with over 3000 watts, yet he is barely tipping 146db. 160 is not an easy task.

I've even seen a single 15L7 in a bandpass box and it barely made it to 157db.

haibane... a simple typo... my apologies :rolleyes:

and Gsteg..... naw it was in an Explorer... yes it was a big ass box..... and yes the car is driveable(sp)

and hitting 160 is an easy task, just depends on how you do it......yall is just coming at me like "yea right" stop criticizing(sp) everthing i say.... why would i lie about something so elementary?

Because not all mics are the same. the B&K mics used in DB drags are legit. They are the most accurate meter. The AC mics and cheaper mics are easy to hit high numbers. a 150db on an AC mic is equivalent to about 143db on the B&K mic. After 150db, it gets even easier to reach higher decibels.

Its great that you scored a 165db, but in a sense, its nothing since its not an accurate measure. You'll need more displacement than just a single sub in a big cabin like an explorer. People in DB drags has trouble getting 160+ even with their cemented cars and 5,000+ watts.

I'm not doubting you that you scored 165, but I only doubt the accuracy.

No flames at all. Just pointing out my views on things.

Because not all mics are the same. the B&K mics used in DB drags are legit. They are the most accurate meter. The AC mics and cheaper mics are easy to hit high numbers. a 150db on an AC mic is equivalent to about 143db on the B&K mic. After 150db, it gets even easier to reach higher decibels.

Its great that you scored a 165db, but in a sense, its nothing since its not an accurate measure. You'll need more displacement than just a single sub in a big cabin like an explorer. People in DB drags has trouble getting 160+ even with their cemented cars and 5,000+ watts.

I'm not doubting you that you scored 165, but I only doubt the accuracy.

No flames at all. Just pointing out my views on things.


and who's to say that it wasnt a B&K mic? http://www.seventhirty.net/forums/images/saywhat.gif

yall folks on this board are quick to assume http://www.seventhirty.net/forums/images/saywhat.gif!!!!!!!!!!!!!!!

Because I know a system like yours will not get that kind of number on a B&K mic. Not downing your system at all, just mearly stating things. Find anyone that has entered the Db drags. They will tell you for sure it's not easy to get high numbers. Its a tough mic. The only way I know anyone can get their hands on the B&K is if they soley own the meter (got $1500+ to burn?) or go to db drag events.

But of course we always assume something. Every case we assume. Simply human nature. We can never get an exact reply, since there are to many things to be opinionated (sp?) on. The best thing to do is to assume, with objectional statements, and common sense.

Example: One guy goes onto a car audio forum and needs help because there are no sound coming out of his speakers. He tells us what equipment he has. Great. Now do we ask him questions like:

"Did you wire the speakers?"
"Did you open the speaker box to get the speaker out?"
"Is your headunit turned on?"

Those kinds of question we skip, because in the eye of questioner, he will presuppose that you have all that mastered. Now to a higher degree, some people knows what systems are capable of what decibel range, and some will now if the numbers are legit or not considering in equipment and install.

Heck, even people that are using the LinearX are pulling out their hairs when they see their score. I was definitely surprised to see my friend's truck doing onlt 146.6db (switch out 2 E12A for 2 magnums). Then when I factored in the mic he was measured on, I then see why some mics were known as the "bragging rights" mic, and the others were legit.

Definitely I do not know you as well, and you dont know me. If things are be assumed, even if its wrong, then facts must be provided to confirm that the assumption was wrong. I bet we can all sit here and talk all day long about the scores we got on the mic, but that isn't going to get us anywhere. There must be proof for validation. Once we can prove that the assumption is wrong, the other guy will simply zip his mouth, unless he's a total jerk and wants to go at it again, making himself look like an a$s.

I do not know what I'm saying or why I'm rambling. I should go to sleep now. Good night everyone.

:)

So that's why I get 140 on a radioshack mic, lol Just kidding. Anyhow yeah I agree with Gsteg. Termlab mics are another one to try and check out. http://powered4sound.com makes about 300+ on their boxes they make, and they only hit about 140-150 db on a termlab mic. If you have a better box, start selling them.

yeah for real if your box hits 160 easy then you should definetily sell them, its dumb to keep them a secret when you could be making money.

i came into this thread late, which sub are you using to hit these numbers.

Its still going, the long lasting energiezer thread keeps going and going

We need the mod to close this thead. Its getting nowhere...

on second thought, we could keep it down and have our own postwhore fiesta :D

did someone say postwhore?

Yeah, well Gsteg, if you had some cash maybe we could work on this theory, lol. I am thinking 16 A5000SPL, 16 AWT18X, 6.5 cubic feet each, at 37hz. Of course I would need a freaking awesome way to supply power. I am also thinking, we put this in a bus.

Only 99,476 dollars later...