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View Full Version : how to tell what a box is tuned to



Hydrastas
05-18-2008, 07:06 AM
it's got rougly 5.5 ft cubed and 1.96 ft cubed port area, so 7.5 cubed box? not sure how to tell what it's tuned to, oh and i couldn't figure out what size box to make for my american bass dx-15. found info on it but idk wtf Qms/Qts?Qes means, but the numbers are 4.7, .6 ,and .5.

Hydrastas
05-18-2008, 07:10 AM
oh and after completing it i sat it next to car in driveway and played put on by jeezy, at one of the later bass hits in the intro i coulda swore i saw rocks jumpin in the driveway. could be that i've been up all night workin on the box but idk. shortly after it sounded like box was gonna blow apart so i shut system off asap and am here lol. can't wait to put it in the car, i gotta pound the shitt outta the frame to make it fit though. i didn't have a level or a straight edge while making the box and it's made out of scrap wood from 3 other diff sub boxes.

Hydrastas
05-18-2008, 07:17 AM
heres the box, go ahead and flame if you want lol. it's my first time and i did it from 2-6 am, cost me 1$ or less for the screws and electricity to power saw.

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0802.jpg

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0804.jpg

and finished product lol

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0810.jpg

is the port too big or anything?

darkhunter139
05-18-2008, 07:30 AM
No looks like a good size


Just throw the sub in there and ur ready to go

Be sure to take some videos

darkhunter139
05-18-2008, 07:34 AM
oh and after completing it i sat it next to car in driveway and played put on by jeezy, at one of the later bass hits in the intro i coulda swore i saw rocks jumpin in the driveway. could be that i've been up all night workin on the box but idk. shortly after it sounded like box was gonna blow apart so i shut system off asap and am here lol. can't wait to put it in the car, i gotta pound the shitt outta the frame to make it fit though. i didn't have a level or a straight edge while making the box and it's made out of scrap wood from 3 other diff sub boxes.

You better make sure you secure that tail on your car down or its going to blow that thing right off! And make sure you watch out for cops, don't want to be wasting your car audio money on noise ordinance tickets.

Idk though man I might have went with a double baffle if I were you

Hydrastas
05-18-2008, 07:42 AM
lol yea, but what would the box be tuned to? and could this hurt my sub, i tried to watch out for the sub moving too much as i was testing it, but had to throw in a lot of liquid nail to make up for the not having a level.

Hydrastas
05-18-2008, 08:14 AM
alright 30 min of unloading liquid nail up in that *****, so what does it take to find what a box is tuned to?

Hydrastas
05-18-2008, 08:22 AM
i've found some equation for tuning a box, but it's been way too long since math class to figure out how to change it up to be able to find what a box is already tuned to by being randomly made...

MikeR.
05-18-2008, 09:14 AM
Here (http://mobile.jlaudio.com/support_pages.php?page_id=165) and here (http://forum.realmofexcursion.com/showthread.php?t=22850)

It's not hard if you just take the time to do it

Hydrastas
05-18-2008, 10:50 AM
lol what i ended up with was 84 hz, looks like i gotta turn up my filter a little.

Twistid
05-18-2008, 10:58 AM
what you do is mount the woofer, then use a hose or a bucket and pour water into the port , play a simple test tone from 0-100 hz, when the water comes shooting out of the port, thats what its tuned to... the thing is, it has to be filled up as much as possible to achieve the desired results

its what most dbdrag and iasca people use to determine tuning on walls and oddly shaped boxes

PV Audio
05-18-2008, 11:48 AM
That port is way, WAY too large. The box is probably tuned to 65+.



edit: Yep, 80s~ seems not too big a stretch.

kovemaster559
05-18-2008, 12:04 PM
big *** port

PV Audio
05-18-2008, 12:05 PM
big *** port:laugh: :word:

benchambers80
05-18-2008, 12:07 PM
If you cut down the size of the port area you could lower the tuning, or extend the port will also lower the tuning. But you will lose airspace that way.

bjfish11
05-18-2008, 12:08 PM
To be honest, the tuning is probably the least of your worries. LOL.

There are sooooo many other things about that box...

PV Audio
05-18-2008, 12:11 PM
To be honest, the tuning is probably the least of your worries. LOL.

There are sooooo many other things about that box...Just because the teacher didn't pat us on the head when we were in school doesn't give you the right to be mean to others, now does it? :D

bjfish11
05-18-2008, 12:13 PM
Just because the teacher didn't pat us on the head when we were in school doesn't give you the right to be mean to others, now does it? :D

LOL, I wasnt trying to be mean. But hey, he is from Kansas, I would gladly help him out if he had any questions ;)

avs20
05-18-2008, 12:18 PM
I honestly dont know what to say. Is the top made of 3 different pieces?!

PV Audio
05-18-2008, 12:22 PM
LOL I just noticed that. What the **** did you use to cut that circle with, a butter knife? You like whittled away at the wood, not cut it.

benchambers80
05-18-2008, 12:23 PM
He is learning and gaining experence in building boxes. He should do some designing first but for what he spend was well worth the learning experience, at least he didn't go waste some good mats doing this.

PV Audio
05-18-2008, 12:24 PM
He is learning and gaining experence in building boxes. He should do some designing first but for what he spend was well worth the learning experience, at least he didn't go waste some good mats doing this.:laugh: Please don't tell me about learning and needing to design first, as I think I invented that category, as I'm fairly positive someone will prove via a certain picture.

benchambers80
05-18-2008, 12:27 PM
Pic, huh, who gots it?

iowaaurora
05-18-2008, 12:32 PM
you have got to be jokeing

maldecido33
05-18-2008, 12:41 PM
To be honest, the tuning is probably the least of your worries. LOL.

There are sooooo many other things about that box...

And who exactly made you an authority on enclosures?


: )

benchambers80
05-18-2008, 12:43 PM
And who exactly made you an authority on enclosures?


: )

Doh, smiley face.

edzy
05-18-2008, 12:51 PM
As twisted suggested, Use water to find tuning. Heres a vid on it.

http://www.youtube.com/watch?v=6rXU80JcRMU

Then check this site out and research a little for your next project.

http://diyaudiocorner.tripod.com/software.htm

Nice attempt. but that tuning is way too high. you need a smaller port area.

BEAVER.989
05-18-2008, 01:12 PM
My mother taught me that if I didn't have anything nice to say, I shouldn't say anything at all.

If that's the case I probably shouldn't have even said this much, huh? Sorry Mom.

PV Audio
05-18-2008, 01:16 PM
No, that's probably because your mouth is sucking so much **** and it's impolite to talk with your mouth full.

MyFartsStink
05-18-2008, 01:22 PM
http://i200.photobucket.com/albums/aa46/hydrastas/SANY0810.jpg


throw that piece of **** away man. Seriously.
That made me sick to my stomach

BEAVER.989
05-18-2008, 01:24 PM
No, that's probably because your mouth is sucking so much **** and it's impolite to talk with your mouth full.

More than a little uncalled for...

Tehgregzor
05-18-2008, 01:29 PM
Well....are you on that tight of a budget? You've got something to work with...all you need now is a blueprint, a 25$ sheet of MDF, and a jigsaw to cut better with. And a level, lol.
Try again man, and work when you're not tired. You will be surprised and proud of yourself.

Hydrastas
05-18-2008, 01:50 PM
alright i just spent 5 hours getting the ****ing box to fit into my trunk LOL. i ended up having to take off a door, take out the back seats and then spend 3 hours pounding the **** outta the frame of the trunk only to realize that the box wouldn't fit no matter how far i pounded it in. So after the 5 hours of busting up a sweat i got so pissed off that i took the skill saw and just cut off 6 inces of the port. it wasn't until afterwards that i noticed i dropped the tuning of the box as well lol, but after readjusting the box i managed to cram that mother****er in the trunk. so what i thought would be a 3-4 hour project ended up being a 10 and a half hour one.

Hydrastas
05-18-2008, 01:55 PM
heres some pics of it finally ready

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0826.jpg

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0825.jpg

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0824.jpg

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0823.jpg

got a video but it's taking a while to upload, i'll admit i never thought a ported box would outdo 2 15s and 2 12s and even off of twice as less power. just mind boggling i guess. it's not just noticably louder it's like a medicine ball to the chest compared to old setup with beach ball difference, so would that mean at least 6 dbs more?

Hydrastas
05-18-2008, 01:59 PM
oh yea and i still have no idea what it's tuned to, but i've been testing a lot of diff rap songs on it and i keep my face right in front of the woofer and smell for the voice coil. no smells yet so im guessing it's around the right size box for this sub. if anyone has an american bass dx-15 or knows about it's specs i wouldn't mind knowing if 8 cubes is too much for it lol, or is the total volume of the box not important for the sub and more so the port?

Hydrastas
05-18-2008, 02:14 PM
alright vid finally up,

http://i200.photobucket.com/albums/aa46/hydrastas/th_SANY0827.jpg (http://s200.photobucket.com/albums/aa46/hydrastas/?action=view&current=SANY0827.flv)

Hydrastas
05-18-2008, 02:38 PM
if anyone can help me with finding the tuning, the total cubed is 6.75ft cubed on the dot, port is 22" long, 4 and half wide, 16" tall so .92 ft cubed port, so a box thats 5.83 ft cubed and has a .92 ft cubed port. would this be anywhere around 30-60 hz or higher? as for the 3 numbers i managed to find off american bass website, 4.8, .66, and .58. would a bigger box area and also a bigger port be like the same thing?

benchambers80
05-18-2008, 02:41 PM
Dude, Scrap the box, ask for a free design, someone will help you. Grab some mats from somewhere, start over, wood glue is like 2$. you will be much happier.

MyFartsStink
05-18-2008, 02:42 PM
alright vid finally up,

http://i200.photobucket.com/albums/aa46/hydrastas/th_SANY0827.jpg (http://s200.photobucket.com/albums/aa46/hydrastas/?action=view&current=SANY0827.flv)

I just threw up just now. Thanks ****er, I just wasted some **** food. Send me $15 in paypal now!!!

Hydrastas
05-18-2008, 02:47 PM
I just threw up just now. Thanks ****er, I just wasted some **** food. Send me $15 in paypal now!!!

lol, is the excursion of the sub too high? i can't tell if it's overworking and have no idea if it's in right size box.

MyFartsStink
05-18-2008, 02:50 PM
lol, is the excursion of the sub too high? i can't tell if it's overworking and have no idea if it's in right size box.

No ****ing way. Your amp is ****, your sub is ****, your box is ****. Do everyone a favor and put a whole bunch of explosives in that car and drive into your own house with it and blow up everything about you.

btdickey99
05-18-2008, 02:50 PM
LOL, I wasnt trying to be mean. But hey, he is from Kansas, I would gladly help him out if he had any questions ;)

not even you could help this kid

sorry to say it

btdickey99
05-18-2008, 02:54 PM
I guess its better than his last install...at least he is only using 1 sub, 1 size, 1 amp, and 1 box

SVTLightning01
05-18-2008, 02:57 PM
this has got to be a joke.

btdickey99
05-18-2008, 02:58 PM
this has got to be a joke.

I keep saying the same....:crap:

Hydrastas
05-18-2008, 03:05 PM
this has got to be a joke.

actually it's a 160$ setup that broke my fin, so what if i started out in car audio without busting open my checkbook. it sounds good and pounds just as good buck for buck as most high budget systems i'd say. im just wanting to find the **** tune i ended up with for this box.

avs20
05-18-2008, 03:08 PM
actually it's a 160$ setup that broke my fin, so what if i started out in car audio without busting open my checkbook. it sounds good and pounds just as good buck for buck as most high budget systems i'd say. im just wanting to find the **** tune i ended up with for this box.

You really think that? SERIOUSLY?

Hydrastas
05-18-2008, 03:19 PM
yea, appearances can be deceiving. although the box looks like **** it's actually not too bad. it trumps my former setup that consisted of well made boxes.

Hydrastas
05-18-2008, 03:20 PM
your setup may be like mike tyson, but pound for pound roy jones can punch just as hard as to my saying of buck for buck.

bass-aholic
05-18-2008, 03:26 PM
Ive built worse boxes. srsly. we all start somewhere. That sub should be fine off the power but your tuning is way to high for most music. set your SSF to the max

pr-festiva
05-18-2008, 03:27 PM
Isn't a subs motion at minimum at the tuneing freq.Not to thread jack but it might help a bit.

maldecido33
05-18-2008, 03:43 PM
:laugh: Please don't tell me about learning and needing to design first, as I think I invented that category, as I'm fairly positive someone will prove via a certain picture.

I really need to save that pic to have on hand :( I'm sure someone else will come to the rescue, though.

maldecido33
05-18-2008, 03:46 PM
I really don't know what to say.

At least making such a big box means you're making the most of the **** power you're sending the sub.

djmadfx
05-18-2008, 03:52 PM
The previous setup for those who are curious:

http://www.caraudio.com/forum/showthread.php?t=301595

:sick:

Hydrastas
05-18-2008, 03:58 PM
^^ i've still got that 2nd sony amp, im thinkin about strappin dem *****es and throwin this sub what it wants. but seriously, my new single sub setup is actually much better than that one. took me a while to finally get the nerve to test out a ported box for the 15" but apparently a single ported 15 gets louder than 2 12s and the 15 sealed.

edit: oh and with less power

pr-festiva
05-18-2008, 04:05 PM
Wouldnt haveing a port with that much area that close to the rear cause some restriction.Making the port seem a little longer to the box and lowering the tuneing a bit?

PV Audio
05-18-2008, 04:36 PM
More than a little uncalled for...I'm just breakin ya balls :laugh:

PV Audio
05-18-2008, 04:38 PM
Oh God sir, that is worse than anything I've ever made. And that's BAD.

PV Audio
05-18-2008, 04:40 PM
After watching the video, I actually suggest that you throw the box away and make a new one. The joints are flapping which looks like it's causing a loss of pressure. That's the entire theory behind a ported box, and if the air within the enclosure cannot support the cone, you can damage your speaker. That's what I fear from this.

ThatChevyGuy
05-18-2008, 04:41 PM
You sir need to give up on caraudio.
I tried to give you advice and i see you took it in building a ported box.
Now please just give up.

PV Audio
05-18-2008, 04:44 PM
Isn't a subs motion at minimum at the tuneing freq.Not to thread jack but it might help a bit.;)

PV Audio
05-18-2008, 04:44 PM
I really don't know what to say.

At least making such a big box means you're making the most of the **** power you're sending the sub.Which is also dangerous because the cone is no longer supported by the enclosure.

Hydrastas
05-18-2008, 04:48 PM
Which is also dangerous because the cone is no longer supported by the enclosure.

it's held up through a few dozen songs so far, would there be any early warning signs from the sub?

darkhunter139
05-18-2008, 04:49 PM
Im starting to wonder if this guy is joking or not after I saw the pics of the burnt wire.

Pretty sure he is but still.....

darkhunter139
05-18-2008, 04:51 PM
alright vid finally up,

http://i200.photobucket.com/albums/aa46/hydrastas/th_SANY0827.jpg (http://s200.photobucket.com/albums/aa46/hydrastas/?action=view&current=SANY0827.flv)

You better duct tape that tail down man

puppie_chow
05-18-2008, 04:56 PM
:laugh: Please don't tell me about learning and needing to design first, as I think I invented that category, as I'm fairly positive someone will prove via a certain picture.
http://i27.tinypic.com/zbrc5.jpg

Love,
CJ

PV Audio
05-18-2008, 05:03 PM
:bowdown: Money.

Hydrastas
05-18-2008, 05:04 PM
After watching the video, I actually suggest that you throw the box away and make a new one. The joints are flapping which looks like it's causing a loss of pressure. That's the entire theory behind a ported box, and if the air within the enclosure cannot support the cone, you can damage your speaker. That's what I fear from this.

do i need moar caulk?

darkhunter139
05-18-2008, 05:08 PM
do i need moar caulk?

Burn the box and start over

Hydrastas
05-18-2008, 05:10 PM
Burn the box and start over

it'd take me an hour min to take this box back out, what about gorilla glue?

darkhunter139
05-18-2008, 05:11 PM
it'd take me an hour min to take this box back out, what about gorilla glue?

Just get a hammer and smash it up before you try and take it out

Hydrastas
05-18-2008, 05:14 PM
Just get a hammer and smash it up before you try and take it out

hmm, that would work. im looking to replace this sub anyhow, what if i just plugged it up to a 220 plug in? i wonder if the sub would go before the box blew apart or not lol

PV Audio
05-18-2008, 05:15 PM
do i need moar caulk?No, you need to make a new box.

darkhunter139
05-18-2008, 05:16 PM
hmm, that would work. im looking to replace this sub anyhow, what if i just plugged it up to a 220 plug in? i wonder if the sub would go before the box blew apart or not lol

If you want to set your house on fire go for it. Otherwise I would not advise it.

And dude, get someone else to build the box for you.....

Hydrastas
05-18-2008, 05:16 PM
No, you need to make a new box.

any certain improvements i should make note for the new one compared to this box?

MikeR.
05-18-2008, 05:16 PM
it'd take me an hour min to take this box back out, what about gorilla glue?

Gorilla glue is weak sauce. Just use standard woodglue.

Surely somone on this forum would be nice enough to give you an old ported box. If I were you, that's what I would do because I don't think your woodworking skills are good enough to build a box even if somone provided you with an excellent plan.

Steven206Seattl
05-18-2008, 05:17 PM
At least you built a box yourself and installed your system instead of paying someone else.

Steven206Seattl
05-18-2008, 05:18 PM
Gorilla glue is weak sauce. Just use standard woodglue.

Surely somone on this forum would be nice enough to give you an old ported box. If I were you, that's what I would do because I don't think your woodworking skills are good enough to build a box even if somone provided you with an excellent plan.

Gorilla tape is the **** though

PV Audio
05-18-2008, 05:21 PM
any certain improvements i should make note for the new one compared to this box?Yes, get a design first, use 3/4" MDF, wood glue, predrill all screwholes and have someone who is good at box building help you.

MikeR.
05-18-2008, 05:28 PM
Yes, get a design first, use 3/4" MDF, wood glue, predrill all screwholes and have someone who is good at box building help you.

I can see where your going with this but I really think the kid needs to have somone build it for him. I mean look at it....do you really think he should have the opportunity to build another one of those things?

PV Audio
05-18-2008, 05:31 PM
I can see where your going with this but I really think the kid needs to have somone build it for him. I mean look at it....do you really think he should have the opportunity to build another one of those things?
http://i27.tinypic.com/zbrc5.jpg
The guy who made these should have stopped building, but he didn't.

darkhunter139
05-18-2008, 05:31 PM
I can see where your going with this but I really think the kid needs to have somone build it for him. I mean look at it....do you really think he should have the opportunity to build another one of those things?

After seeing this

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0060.jpg

Its kind of hard to take this kid seriously.

MikeR.
05-18-2008, 05:33 PM
Ok this has to be a joke. No one could honestly think that's right^^^

Hydrastas
05-18-2008, 05:43 PM
that box that had the 2 12s in it is part of the new ported box.

bjfish11
05-18-2008, 05:46 PM
Oh my dear Lord.... :eek:

darkhunter139
05-18-2008, 05:48 PM
that box that had the 2 12s in it is part of the new ported box.

Yeah two different 12s

EDIT: wait you broke that box up to make ur new one :D

ThatChevyGuy
05-18-2008, 05:49 PM
I told ya just give up

MikeR.
05-18-2008, 05:50 PM
that box that had the 2 12s in it is part of the new ported box.

Wait a second...you recycled your old box and used it to build your new box?

Are you joking about all this?

maldecido33
05-18-2008, 05:51 PM
:bowdown: Money.

Picture saved for future reference.

Hydrastas
05-18-2008, 05:56 PM
Wait a second...you recycled your old box and used it to build your new box?

Are you joking about all this?

lol no, i got a random urge to build a box so i used what i had. there was some plywood leftover from remodeling the bathroom that i managed to use for the base, the rest is from scrapping the other sub boxes.

MikeR.
05-18-2008, 06:01 PM
lol no, i got a random urge to build a box so i used what i had. there was some plywood leftover from remodeling the bathroom that i managed to use for the base, the rest is from scrapping the other sub boxes.

Do you do everything in life this half ***? Honestly bro how could you think that what you built was qualified to be a subwoofer box. I'm not ripping on you for feeling the need to build a box, you just did it sooooo badly. By the looks of things though I'm guessing you don't care to much about your car, much less what you put in it.

In the end it's your stuff so have fun:)

Hydrastas
05-18-2008, 06:07 PM
heres one of the boxes i took apart to use on my box. it was held together with staples lol. at least i used screws and liquid nail.

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0807.jpg

Hydrastas
05-18-2008, 06:09 PM
Do you do everything in life this half ***? Honestly bro how could you think that what you built was qualified to be a subwoofer box. I'm not ripping on you for feeling the need to build a box, you just did it sooooo badly. By the looks of things though I'm guessing you don't care to much about your car, much less what you put in it.

In the end it's your stuff so have fun:)

i wouldn't say half ***, i used what i had available to a full *** extent i'd say

darkhunter139
05-18-2008, 06:12 PM
i wouldn't say half ***, i used what i had available to a full *** extent i'd say


So whens attempt number 2 coming?

Hydrastas
05-18-2008, 06:14 PM
So whens attempt number 2 coming?

i suppose i'll wait til payday and buy some materials, gonna go with a bit smaller box as well lol. although im diggin the 26 hz note this thing can play. felt like a chest massage from inside out. if i go with a smaller box what would i have to tweak about the port size to keep the subs lows the same? just have the port in proportion to this boxes size? but on a smaller scale? or would the output be diff?

darkhunter139
05-18-2008, 06:15 PM
Get someone to make you a box design man

kotec123
05-18-2008, 06:27 PM
every thread this guy makes is like this.....its gotta be a joke....

edzy
05-18-2008, 06:33 PM
for gods sake, somebody post a drawing of a box plan for this dude.

Try playing around with this to see how port W and L effect tuning.

http://www.reaudio.com/speaker_box/LPort_Box_Calc.html

SVTLightning01
05-18-2008, 09:37 PM
lol no, i got a random urge to build a box so i used what i had. there was some plywood leftover from remodeling the bathroom that i managed to use for the base, the rest is from scrapping the other sub boxes.

i hope your bathroom remodeling had a little more effort.

avs20
05-18-2008, 10:12 PM
He HAS to be joking. NOBODY ***** at life this much.

maldecido33
05-18-2008, 10:32 PM
If he is indeed joking, he must not have to exciting of a life to go through what he's going through just to play off a "joke" online.

fshanda
05-19-2008, 06:00 AM
i hope your bathroom remodeling had a little more effort.

I want a pict of the bathroom. If that box and system looks good then I have to see a pict of something else.

Those staples would have been fine building the first box if you would have used some wood glue. Liquid nails is construction adhesive mainly used as panel/drywall adhesive or for everyone else that has no clue as to what glue to use where.

Get some wood glue
Get a plan
Take some time and plan ahead you just might surprise yourself


Please post picts of the bathroom.

pr-festiva
05-19-2008, 06:19 AM
I think people should let him learn from his mistakes.Holding his hand by him useing some one else's design gives him no reason to grow as a box builder.If he is aloud to try his own thing he will either get better or sooner or later give up and have a shop do it.Either way the car audio world wins:)

bjfish11
05-19-2008, 08:04 AM
I think people should let him learn from his mistakes.Holding his hand by him useing some one else's design gives him no reason to grow as a box builder.If he is aloud to try his own thing he will either get better or sooner or later give up and have a shop do it.Either way the car audio world wins:)

Doing designs has nothing to do with being capable of building enclosures. ;)

I for one, can design simple enclosures, but no where near what a lot of others can do.

PV Audio
05-19-2008, 10:20 AM
I think people should let him learn from his mistakes.Holding his hand by him useing some one else's design gives him no reason to grow as a box builder.If he is aloud to try his own thing he will either get better or sooner or later give up and have a shop do it.Either way the car audio world wins:)Bullshit. If he has a good design, and builds it moderately well, he'll be so impressed that he'll try again. If he keeps guessing and doesn't learn anything, he's not getting anything out of it.

Hydrastas
05-19-2008, 01:56 PM
alright, after sleeping for 18 hours im starting to remember what i did yesterday. so the box isn't as sturdy as it could be. it still sounds pretty ****** imo. i know with all the sealed boxes i've had i never knew what it truely felt like to be hit with 26-30 hz at a high volume. im never again going sealed thats for sure. perhaps i got lucky on the port size since it was totally random and the box is sized the way it is cause thats the biggest i could possibly fit.

darkhunter139
05-19-2008, 01:58 PM
Start over dude

Get a box plan

Go over to home depot and have them cut you the size's you need

get wood glue and silicone

Hydrastas
05-19-2008, 01:59 PM
next go around im gonna use non rained on pos old box wood and wood glue. perhaps even throw in some braces for the port instead of just the top and bottem boards for support. also lookin into some carpet, i suppose the bare wood and in this case nasty lookin used up rained on too many times plywood is somewhat unfasionable.

MikeR.
05-19-2008, 02:01 PM
So I'm still wondering are you serious about those boxes? I mean did you honestly think you did a good job?

darkhunter139
05-19-2008, 02:02 PM
So I'm still wondering are you serious about those boxes? I mean did you honestly think you did a good job?

At first I thought it had to be a joke but I dont think anyone would screw their car up that bad just for a joke....

Hydrastas
05-19-2008, 02:08 PM
after i heard it i was at least glad it didn't sound like total crap

btdickey99
05-19-2008, 02:09 PM
At first I thought it had to be a joke but I dont think anyone would screw their car up that bad just for a joke....

that is what is going thru my head....I dont think someone would ever take the time and effort to screw their car up that much just for a joke

darkhunter139
05-19-2008, 02:10 PM
It sounds like crrap dude trust me

You are just so use to it you dont realize. Build a good box and it will sound much better

Hydrastas
05-19-2008, 02:17 PM
It sounds like crrap dude trust me

You are just so use to it you dont realize. Build a good box and it will sound much better

maybe, it's hard to imagine sounding better than this though.

darkhunter139
05-19-2008, 02:18 PM
maybe, it's hard to imagine sounding better than this though.

For you maybe :laugh:

JCivicHb
05-19-2008, 02:51 PM
were you on a meth binge when you built this lol? anyway my friends dad showed me you can find tuning of the box by getting like 20-100 hz test tones, and play them while watching your sub, not too loud, just make the sub move. You want to watch for the frequency that moves your subs the least, and thats right around where your tuned. he even put a piece of paper on the cone for a better visual. Good luck man

pr-festiva
05-19-2008, 03:14 PM
Bullshit. If he has a good design, and builds it moderately well, he'll be so impressed that he'll try again. If he keeps guessing and doesn't learn anything, he's not getting anything out of it.

He will not learn from some one else doing his design.It will just improve his wood working skills .He needs to start with the basics like math and what tuneing is to understand why a design is good in the first place. If not he will just be copying designs and he will never be able to make his own.When did it become a sin to read?

MikeR.
05-19-2008, 03:36 PM
He will not learn from some one else doing his design.It will just improve his wood working skills .He needs to start with the basics like math and what tuneing is to understand why a design is good in the first place. If not he will just be copying designs and he will never be able to make his own.When did it become a sin to read?

Dude look at his pictures.....just look at them. Don't tell us he needs to keep trying to build specifically tuned subwoofer boxes, he needs to learn woodworking skills on birdhouses or some **** like that.

I see what your saying, but no. The kid needs to start off small before he jumps into this. The best he can hope for is somone to do all the cuts for him, and he can put it together.

528hz
05-19-2008, 03:56 PM
If you have been on here since 2006 and have only got this far.....then either CA.com has failed as a forum or you need to get out of stereos and let someone else do it for you....

pr-festiva
05-19-2008, 04:27 PM
A regular ported box is a small step,granted he should have started with a sealed box.So we give him a box design and he builds it.He still wont know why its good. This thread was about finding tuning not wood working.I dont care what his box looks like because he has no idea what Fb,Vb Or F3 or any of that means yet.He should draw up a box plan on his own,figure out all the measurements on it.Then come on here and get some problems fixed with out all the hassle.

PV Audio
05-19-2008, 04:44 PM
Dude look at his pictures.....just look at them. Don't tell us he needs to keep trying to build specifically tuned subwoofer boxes, he needs to learn woodworking skills on birdhouses or some **** like that.

I see what your saying, but no. The kid needs to start off small before he jumps into this. The best he can hope for is somone to do all the cuts for him, and he can put it together.Precisely. It's been shown many times that the thread starter does things half assedly, so expecting him to understand what Q means when designing a box is a bit ambitious.


A regular ported box is a small step,granted he should have started with a sealed box.So we give him a box design and he builds it.He still wont know why its good. This thread was about finding tuning not wood working.I dont care what his box looks like because he has no idea what Fb,Vb Or F3 or any of that means yet.He should draw up a box plan on his own,figure out all the measurements on it.Then come on here and get some problems fixed with out all the hassle.I'm honestly being as nice as I can when I say this, but how the hell is that a good idea? Trial and error is NOT the way to learn how to design enclosures, and believe me when I say this, I am living proof of that. I probably built 30 "speakers" without knowing what I was doing before I learned loudspeaker theory, and the first set there after was like someone lifted a bag from off my head. If you know what to expect, you can build that and compare it to something else; not just guessing what changed from one guess box to the next.

pr-festiva
05-19-2008, 04:57 PM
He can build the most beutifull box ever and with out knowing any thing about it,it is still worthless.I have been saying he needs to learn the theory first and then design his own box then get our advice on it.Also when building spl boxes there is alot of trail and error,agree or no?

MikeR.
05-19-2008, 08:48 PM
He can build the most beutifull box ever and with out knowing any thing about it,it is still worthless.I have been saying he needs to learn the theory first and then design his own box then get our advice on it.Also when building spl boxes there is alot of trail and error,agree or no?

Your fighting a battle that simply cannot be won

In your mind do you honestly think he is capable of doing all that you mentioned? Before you answer I want you to really think about it....

Were not stating the box needs to be pretty, infact I dont' think anyone was ripping on the fact that it was ugly more than the fact that there was no possible way that it performed to the most minimal of standards a subwoofer box can be based off of.

PV Audio
05-19-2008, 11:30 PM
He can build the most beutifull box ever and with out knowing any thing about it,it is still worthless.I have been saying he needs to learn the theory first and then design his own box then get our advice on it.Also when building spl boxes there is alot of trail and error,agree or no?
Yes, I agree completely, but this isn't an ordinary situation. Someone who installs two different size drivers of different brands in a single box and runs them with another different sized driver from another different brand and calls it a system most likely won't even want to learn the theory. We are the minority, and I know that you know that. We like to know how things work to make them better. Most, however, just want them to be good already and couldn't care less how it works. He fits into this category. Expecting someone to learn about loudspeaker theory is almost preposterous when they recycle wood from old enclosures and make panels out of odd shaped scraps of different kinds of wood. :)

Your fighting a battle that simply cannot be won

In your mind do you honestly think he is capable of doing all that you mentioned? Before you answer I want you to really think about it....

Were not stating the box needs to be pretty, infact I dont' think anyone was ripping on the fact that it was ugly more than the fact that there was no possible way that it performed to the most minimal of standards a subwoofer box can be based off of.Exactly what I was saying, nicely put. :)

Hydrastas
05-20-2008, 01:28 AM
alright so i've got a design, the enclosure calc says it'd be at 34.75 hz. would that be alright?

http://i200.photobucket.com/albums/aa46/hydrastas/boxdesign.jpg

Hydrastas
05-20-2008, 01:41 AM
and i get 5.64+ .331= 5.971 cu ft for box size after port? with port being 1.127 cu ft, numbers sound about right? and i finally replaced the ole ab dx 15 for a Audiopipe TXX-SPL15. i've been lookin everywhere for a box spec for this sub but no luck so far, not sure if this box design would go well for it or not.

PV Audio
05-20-2008, 02:04 AM
alright so i've got a design, the enclosure calc says it'd be at 34.75 hz. would that be alright?

http://i200.photobucket.com/albums/aa46/hydrastas/boxdesign.jpg
It kinda depends on how the wood is oriented, as you can throw off dimensions by 1.5".

pr-festiva
05-20-2008, 07:26 AM
Wow what do ya know,all ready designing his own box with a little help from his friends.My friend mark started the same way as hydrastas,now he is doing much better.And yes i think he is capable of the things that i said,if he wants to be.Not every one starts off with the right tools,computer programs or money.I know when i first started i done a couple half *** jobs in my ride but i learned from those systems,and now i can look back and say "i can't believe i done that".Im guessing most of us were at that point some where.

MikeR.
05-20-2008, 12:02 PM
Alright he can grasp the rudimentary skills of geometry! Can't wait to see the box!!!!!!!

pr-festiva
05-20-2008, 05:24 PM
should have seen a couple of my first box's,built one out of a particle board coffee table:),tuned one to 19 Hz,those were the times lol.

PV Audio
05-20-2008, 11:04 PM
should have seen a couple of my first box's,built one out of a particle board coffee table:),tuned one to 19 Hz,those were the times lol.:laugh::laugh::laugh: Don't even use that phrase when talking to me.

DBDRAGGUY
05-21-2008, 12:43 AM
How much to build me a box similiar to your original, but for 2 15's?

BuckyBoy
05-21-2008, 01:37 AM
How much to build me a box similiar to your original, but for 2 15's?
:eek:

Hydrastas
05-21-2008, 02:33 AM
alright the new box is finally done, spent a couple hours on it tonight.

only took a minute or two with a crowbar to get the old box out lol.

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0830.jpg

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0839.jpg

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0833.jpg

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0838.jpg

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0835.jpg

i went to home depot today and got some mdf, and i actually used wood glue this time. ended up going smaller than at first, tuned to 35 hz. havn't had time to test it didn't wanna wake the neighbors.

808_bass
05-21-2008, 02:51 AM
can we get a round of applause?? that first box must have been a joke..theres no way you thought that was the right way to install..

DBDRAGGUY
05-21-2008, 02:56 AM
can we get a round of applause?? that first box must have been a joke..theres no way you thought that was the right way to install..

Agreed on the joke part.

Everybody starts somewhere, no sense in posting pics of your first ****** diaper.

Hydrastas
05-21-2008, 03:02 AM
oh yea about what a box is tuned to, does that number have anything to do with it's loudest point? like if a box is tuned to 30 hz is it loudest at 30 hz? or what?

Hydrastas
05-21-2008, 03:02 AM
cause i've seen that the subs supposed to move less at it's tuned hz, if it has less excursion at that number i can't understand the point in it