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View Full Version : Going from Sealed to Ported



SSS 18734
06-22-2005, 04:55 PM
I have 2 Pioneer 2000SPL's, which I had in a pre-fab sealed 1.00 cu.ft. box for a few months. So I decided to build a ported box on my own (my first box).

I built it to Pioneer's specs, 1.75 cu.ft. per sub with a 4" wide, 6.5" long circular port. I plugged in one sub to my amp and gave it 200 watts. It was just as loud, if not louder than both my subs sealed with 800 watts. Then I plugged both in, and WOW what a difference. I turned the system most of the way up and the subs still wanted more and sounded great with little to no port noise, and sound quality pretty much the same as sealed. Unfortunately my head unit broke for some reason shortly after this, so I cant continue listening to my imporved bass till I get it fixed :(

So for those of you contemplating going ported, I would highly reccommend it :thumbupw:

Ill post pics of the box later

tRiGgEr
06-22-2005, 04:59 PM
Pics now or die!!!

traksta15
06-24-2005, 02:25 AM
is it tuned to 45Hz??thats what i got w/my calc??and the sq is still the same??POST PICS!!!!!!!!!!!!!!!!!

kuijo
06-24-2005, 02:46 AM
I know exactly how you feel, I pulled out my old MTXs to put in my girlfriends car. I put them in a ported box and **** it was loud. I was pissed i couldn't fit a ported box in my truck. Oh well i guess

btmorris972
06-24-2005, 08:19 AM
good to hear im going to be building my first box today hopefully.

btmorris972
06-24-2005, 09:03 AM
well it wont let me start a thread for some reason so inm gonna post this her

ok so i recently got a infinity perfect 10.1 currently its in a pre-fab sealed box. i wanna throw it in a ported box so it will get a little louder

the info infinity gave me says the ported box should be

Vbox= 1.00ft3 (28.32 liters) didnt mention sub displacement

infinity is saying the port should be 3 inches wide and 10.40 in long. thats tuned at 35 hz

so if i wanted to build this box it would be 12"X12"x12"

would i be better off having someone on here desighn a box for me??

if i can get the right dimensions early enough im gonna head up to home depot and pick up the mdf

ill post pics

psych0ticnemes1
06-24-2005, 09:22 AM
well it wont let me start a thread for some reason so inm gonna post this her

ok so i recently got a infinity perfect 10.1 currently its in a pre-fab sealed box. i wanna throw it in a ported box so it will get a little louder

the info infinity gave me says the ported box should be

Vbox= 1.00ft3 (28.32 liters) didnt mention sub displacement

infinity is saying the port should be 3 inches wide and 10.40 in long. thats tuned at 35 hz

so if i wanted to build this box it would be 12"X12"x12"

would i be better off having someone on here desighn a box for me??

if i can get the right dimensions early enough im gonna head up to home depot and pick up the mdf

ill post pics

yea i would have someone design it for you, i'll see if i can't wip something up for you, give me driver displacement and i'll give you some dimensions

psych0ticnemes1
06-24-2005, 09:26 AM
pm me, it'll be easier

Decipha
06-24-2005, 09:34 AM
i got 45.3 hz not including sub displacement

btmorris972
06-24-2005, 11:14 AM
ok this probably sounds stupid. im looking over the paperwork and i dont see the subs displacement.

whats the tech term for sub displacement. cause ive got the technical data sheet.

if someone could help me with a box desighn ide appreciate it.

i think the infinity site is down also


thanks once again

btmorris972
06-24-2005, 01:39 PM
i was just reading over all my paperwork.

ok this is from my subwoffer instructions

when using vented boxes we recommend using a subsonic filter to limit the power sent to the speaker at frequencies below the enclosures port tuning frequency, thus limiting the speakers excursion.

how much would one of these cost ive never heard of it??

do i really need it???

btmorris972
06-24-2005, 06:54 PM
ttt

SSS 18734
06-24-2005, 07:44 PM
Here are the long-awaited pics of my box making their final debut. Tell me what you think.
traksta15, im not sure of the tuning, but it doesnt sound any worse than they did in a 1.00 cu.ft. sealed. But its a hell of a lot louder

http://img184.echo.cx/img184/7506/aut09961sq.jpg (http://www.imageshack.us)
There she is... in my trunk. Red carpeting soon to come.

http://img184.echo.cx/img184/8241/aut09972xj.jpg (http://www.imageshack.us)
One of the subs, with the port. Yes, gorilla glue is messy.

http://img184.echo.cx/img184/292/aut09992vx.jpg (http://www.imageshack.us)
Yes, Home Depot does make straight cuts

http://img184.echo.cx/img184/2689/aut09985og.jpg (http://www.imageshack.us)
Another body shot

http://img184.echo.cx/img184/2116/aut10011ty.jpg (http://www.imageshack.us)
You don't see that in just any ordinary '88 Taurus Wagon

http://img184.echo.cx/img184/4902/aut10035zw.jpg (http://www.imageshack.us)
Too bad I can't listen to it... my HU is broken :(

http://img184.echo.cx/img184/4606/aut10020ye.jpg (http://www.imageshack.us)
But its okay because I won a million dollars from Burger King

http://img184.echo.cx/img184/6397/aut10066om.jpg (http://www.imageshack.us)
Yes, my car is fast :up2somet:

cjjackson85
06-24-2005, 07:47 PM
That there is car is a fine driving machine...

jsloan10
06-24-2005, 07:48 PM
Sweet, get some carpet on there while your getting you're HU fixed.
My spl's had the same size box but the ports were twice as long (4x13), I loved it.
I have pics, but they're not digital and I don't have a scanner.

SSS 18734
06-24-2005, 07:51 PM
That there is car is a fine driving machine...

indeed it is

SSS 18734
06-24-2005, 08:28 PM
Sweet, get some carpet on there while your getting you're HU fixed.
My spl's had the same size box but the ports were twice as long (4x13), I loved it.
I have pics, but they're not digital and I don't have a scanner.

what effect did longer ports have on the sound? I cant make mine any longer than about 10 inches, I made the box pretty shallow

cjjackson85
06-24-2005, 08:31 PM
They make the bass sound gooder!

SSS 18734
06-24-2005, 08:33 PM
They make the bass sound gooder!

how much gooder????

cjjackson85
06-24-2005, 08:35 PM
Much gooder!

DBfan187
06-24-2005, 08:38 PM
what effect did longer ports have on the sound? I cant make mine any longer than about 10 inches, I made the box pretty shallowextend them out of the box, could've used areoports too. The smooth flare helps eliminate port noise.

chinny
06-24-2005, 09:34 PM
funny car

SSS 18734
06-24-2005, 09:39 PM
funny car

if by funny you mean dead ****, then yes

ruckus
06-24-2005, 09:47 PM
what effect did longer ports have on the sound? I cant make mine any longer than about 10 inches, I made the box pretty shallow

Elbows ;)

snebes
06-24-2005, 09:55 PM
indeed it is

don't get confused, those were in furlongs per fortnight. Its lightning fast!

chinny
06-24-2005, 10:02 PM
if by funny you mean dead ****, then yes


:crap:

SSS 18734
06-24-2005, 10:04 PM
don't get confused, those were in furlongs per fortnight. Its lightning fast!

haha, im gonna tell that to people who see my speedometer and say "your car only goes 85 mph???" :veryhapp:

kuijo
06-24-2005, 11:10 PM
I"ve heard to use a 1:1.6:.6: rule for the demntions. I have no idea why. Anyone want to explain this to me

SSS 18734
06-24-2005, 11:20 PM
you mean for box dimensions? I've read that too. someone on these forums explained that the sound waves inside the box reflected properly in a box like that... but honestly I doubt it will make any audible difference. Just make whatever fits your trunk best.

94CamryBumpin
06-25-2005, 05:19 PM
looks good mang...gives me some hope when i undergo my box building...

SSS 18734
06-25-2005, 05:23 PM
looks good mang...gives me some hope when i undergo my box building...

definitely. tell me when you get your new SX in. ill help you setup your system and build a box. :thumbsup:

p.s. building the box was a lot easier than I thought

94CamryBumpin
06-25-2005, 06:54 PM
definetly...will do...

traksta15
06-26-2005, 02:33 AM
im afraid i'll lose the sq if i tune that high (45ish), any insight on this fellas??