Has anybody ported their trunk-well box? I'm looking into doing into but I don't know how to/the right specs to do it. I used the the dimensions from this site to build my box. I was wondering if anyone did it or could tell me how to do it.

 

I am not sure on how to do it but make sure your subs manufacture recomends it, see what the recomend. They might sound better sealed. I am not saying they will, but just make sure you do some research before you port what you have.

 

forgot about that thanks.. i will check and see what they say .. im pretty sure they said it could be either.. but i will double check

 

well each sub needs a 2.5" x 12.5" port thats 20" long, i dont think that could fit.. but could you put 2 ports for each that are 1.25 x 6.25.. would it be the same?

 

Try this site dude-its a program for building boxes. You enter in the subs specs, and it will tell you port size, spl, excursion, all kinds of stuff. Takes some time to figure out but once yo get familiar with it its great. http://http://www.linearteam.dk/default.aspx?download=winisd As for the ports, going to 2 wouldn't change the demensions of the port, but to tune it to the same as frequency as haveing 1 port they would need to be 40 inches long

 

link isnt working for me, but the name of the prog is winisd right? i think ive heard of it

 

I put a set of 3 X 13in ports in the side of my factory built well box for a set of Bostwick HD Pro's and it sounded killer, boxes were a little to large so it had massive low end response and was a little faint in the upper register but it was extremely loud. I went back to the old setup with 1 10in JL W3 in the factory spec ported box, that fits in the well very nicely and you could fit 2 in there if you aimed them both up and had nothing else occupying the well.

 

you dont happen to have any pics of the box you first had do you? with the bostwicks in it? where were the ports located? on the side so they were hidden?

 

here bandit try these see if they help any.hope they do.

http://www.splbassx.com/forums/index.php?showtopic=9047

http://www.the12volt.com/caraudio/boxcalcs.asp


http://www.diysubwoofers.org/

enjoy and if ya figure it out give a hollar i built the same basic box as in this forum https://www.thirdgen.org/forums/car-...l-sub-box.html and haven't ported it but have thought about it.

 

i built the same the box from the same thread.. i think either tomorow or during the next week i pull the box and try porting it on the side of the box.. so if it sounds like crap or i gotta change something it can be easily repaired.. i let you know how it turns out.. but im still not sure if i should go with a square port or a round port

 

Your port will give the best boom if it is facing opposite the speaker...it needs room to "breathe"....imho...have enough air space in them that a sealed box works best...however...for a sealed box you need more power to get the same dB level from the speaker vs. a ported box with same speaker...if you listen to rock music primarily you will enjoy the sealed box as it has tighter or mor punch to the bass note whereas the ported box booms and rumbles which tends to lend itself to r&b or rap...what brand and model speaker(s) are you putting in the box?

 

i have my Kicker CompVr's in there DVC 4ohm subs.. the newer silver version.. i was thinking i could get it louder if i ported... i thought about facing the ports straight up, with the woofers, but i dont think i could fit them in there due to the limited space
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ive also seen them say, speakers up, ports back.. meaning to port it on the back of the box, but its hard to do that with no space on this box

 

Ports in the back of the box is basically a home stereo thing to hide junk noise the port can make, in a car it really doesn't matter because of how the subs are positioned plus you have a TON of reflective surfaces in small confines to deal with. In my experience it's best to have the ports aim the same direction as the sub in a car enviroment. This also makes it alot easier to position your subs.

 

Due to the shape of the well box we built I personaly have the sub on 1 side over 1 of the humps b4 the big drop for the well.I plan to add another infinity or use both the old petras and have 1 on each side.If I port mine I plan to sink the port tubes towards the middle oof the box ,seperate each side making 2 chambers 1 for each sub.And prolly run my amp in the middle with a port on either side of the amp potentialy allowin a crossflow of moving air across the amp to assist in cooling.Either way I figure by seperating the box into 2 sections,1 per sub,and dropin the tubes towards the middle as opposed to either side this should allow me to have enuff depth for each tube and tuneing.Seeing as the center of the box is the deepest area.
I think theres also a technique of building the chambers with slotted ports as opposed to tubed.I'm still reading that info.It's found in 1 the links i posted earlier.
Have fun......Bill

 

It makes no difference where you put the ports. The frequencies coming out of the ports are so low that their soundwave is very long, and moving the port a foot or two here or there won't matter. When I build ported boxes, and asthetics are not an issue, I design it so that the woofer is as close to the back as possible, and then put the ports wherever there's room.

 

coincidence bill cause i just pulled me box last night to do the same thing

Jim: Have you made the trunk-well box ported?

 

I've made a couple. I don't offer them for sale because they wind up being massive and cost a fortune to ship, but a few years back I built one for a guy that drove up to get it. It hammered.

 

do you have the specs? did you use the dimensions off this website for the box, or did you build i different one?

 

Hmmnn for some reason my last post didn stick.Anyways Bandit.Check out Badmans thred.It has pics of a box like ours.And the dimensions of the 1 in htis fourm are reeeaalllll close to fittin like a glove.I built mine and covered it with red felt from walmart matchs the red carpet in my 90 real close.

link ta bads thred.https://www.thirdgen.org/forums/car-...-question.html
Also like i told him check out the yards i just picked up a set of the factory bass box's from a bird.They came in some c-ros birds and T/A's.Sounded decent and fit in the 6x9 spaces xtended down into the hole b4 the rear wheel wells.

 

I designed it from scratch. I have no need for other people's dimensions. I didn't save the plans, since that particular box was useful only for those subs. Having the proper enclosure volume and port tuning frequency is critical to getting good sound. You can't slap any sub into a ported box and expect good results.

The box was huge, at around 2.5 cubes per sub, and I used a pair of 4" aero ports. The subs faced up in a conventional type of configuration, and the ports were facing toward the back seat.

 

was it a regular box or a well box? sorry for all the ?'s

Bill: what were you talking about when you said the bass boxes and the junkyards? these came stock with them?

 

Thats all well and good .I made mine b4 i found the post in here too so have the demensions on paper in the file cabinate.The 1 in the thred is real close to mine ,mines just raised in the back anglein the subs forward.Was passin on the thred to help others.Thats what this is all about ain it.(I may be an @$$ but not ****.)
As for stickin any sub in any box.Yea actually ya can.Unless yer doin compitition sound offs which from the most part seem to center around 1 or so big punchs.Therefore ya do want it ta be just right to maxx yer punch for that note.
However most just want it to sound good,first to themselves and then to most that happen to hear it.Again it all comes down to yer own ears and taste.(Some people like vanilla icecreme and others like mint-choc-chip.)It's all about taste.
I've flipped my subs from box to box maaannnyyy times and it all does sound different.It all comes back to xperementing and yer own taste.
Now bandit theres calculators and equations for figureing out yer volume ect.But personaly I recomend ya just build/get yer box drop yer subs and try it.But remember this ...When ya adjust yer amp ad chose the position of the box and tune yer ports ya wanna do it like yer gonna be listenin to it.I.E. with the hatch closed.Make adj then close and listen.ECT ECT ECT..
I'll snap a pic or 2 of the factory box's i mean soon as time off from work.Like fri mornin after bone yard run.There is a thred in here that mentions it.I'll try ta find it.But all it is is an enclosure that came factory with a 4.5-5" sub with a 4x6 speaker above it.It fits right into the sail panels behind yer head where the 6x9's go.And ya know how 6x9's sound right there to yer ears so wonder how sumthin like mini subs in a small ported box would sound.I have heard the factory setup with these in it and wasn't bad even with ruined speakers.So I plan ta incorporate this in my system.
But I'll look for the thred and get the pix up soonest.Enjoy and remember all the opinions are just that opinions it all comes back to you in the end what you like and how it works/sounds to you.
If it's too loud .....GOOD!!!!Peace bro I'm out.

 

When you mess with Win ISD you'll see that porting an enclosure isn't rocket science, but it is science. You can't just sticking any sub in any old ported box you're going to end up with big holes in your response, or over excursion issues. You can fudge on this a little if you have an adjustable sub sonic filter and a crossover with a good slope. I have ran Soundstream SPL mules in transmission line enclosures that they should NOT have been in but by setting the crossover to 70hz on the low pass, and 30hz on the subsonic filter I managed to pull 150.6 with a pair of them in a Honda Prelude on 600 watts. I would NOT have listened to that system however it was extremely peaky and generally sounded like crap, I took it back home and swapped my 10in W3 back in. This 10W3 was in the exact same enclosure that I found fit in the well of my Camaro and it's still in there today right beside my nitrous bottle. You can do a fancy well box but I honestly think if you just build a square box that occupies the center of the well you'll be happy with it. That 1 10in sub in the Camaro easily overcomes my exhaust and sounds wonderful.

 

That's the main drawback to WinISD is that it doesn't model cone excursion. Unless you tune your box stupidly high, this isn't likely to ever be an issue in most cases though, especially if you use a subsonic filter as you said. A general rule of thumb is that you should set your subsonic filter at the same frequency as the port tuning frequency, since your excursion goes up fast below that value.

To answer the question up above, the box I built extended down into the well, and also extended forward to approximately 4" or 5" behind the back seat.

 

Well I guess I'm breakin sum written rule then cause the 12 in infinity referance sits all alone on a bridged infinity referance 7521a 2 channel amp in the big old non ported box and sounds just fine to me.It strangely hitts real nice with little distortion and no arrithmitic involved other than compesating for the thickness of the 1 in mdf used for construction.No crossover yet nor any filter.Think the amp has a filter and thats set at about 30 or 40 i think been awhile since i looked.And when use the other box(twin to this one)it has a junk noname unknown out put amp with an old set of 12 in Petras and sounds fine too.Even when I plug the ports.But i like it when the subs hit and the looooonnngg fuzzy stuff hangin down in the ports stands up like hair on a graff generator.Lilltl bit of distortion on the top end of the head units volume control but otherwise sounds ok to my tone deaf ears.
Now when i get the other infinity to match this one plan to run dual 300 watt amps from wally world.Single channel.! per sub.And see what that sounds like and prolly use the infinity amp to drive the Pyles i plan to put in the boxs that sink in the 6x9 areas.
My ears should be ringing longer after the drive home from work blasting megadeth.LOL

 

I don't know what you just said because grammar apparently isn't your friend, but having your sub stuffed into a large sealed enclosure doesn't really have much to do with a ported discussion. Plugging the ports leaves you with a sealed enclosure that gives the system a low Q, which works well in a car environment because of the cabin gain effect.

 

No guess not on the grammar thing.(Not worth the effort).But anyways everyone has their own opinion on sound boxs and subs.In the end it all just comes back to yer own blessed ears and taste.If 1 method doesn't sound ok to you then try another,and remember to always tune as you would be listening to it.Hatch closed.It does affect the sound you hear if you tune with it closed.try it and see.

 

Yes, having the hatch open completely changes the sound, though for "ballpark" settings I've found that when I'm in the back of the car, right over the subs (with the hatch open of course) I dial in the gain to get a fairly balanced sound, and once you close the hatch and go around to the driver's seat, chances are it'll be pretty close.

Another thing that you absolutely need to do when tuning your bass is get the car out of the garage. Even in a large garage, you'll get a lot of reinforcement from the walls, and as soon as you pull the car outside, the bass will be thinner.

 

bill have you started to port yours? if ya dont mind keep me updated

 

The factory well box will take a set of ports relatively well if you install them in the sides or buy the fancy bendable ports from JL or someone. I'll post some pics of the one I ported when I dig it out.

 

91camaro please do curious to see what it looks like

 

Bandit, I again go back to the question of what type of music do you typically listen to because it makes a difference in a car as to whether or not you would want to port your box. If it is primarily rock i would not recommend porting due to the muddy sound typically created inside a car especially a hatchback. There is enough airspace in the car already to give you the dB levels to kill your ears...do you want to hear it or do you want your neighbors to hear it is really the question...ported boxes "carry" farther because the air moves for a longer duration because the excursion of the woofer is greater. In a hatch type car it isn't really needed and sounds bad..you loose much of your midbass notes and cannot regain them without adding a set of 8" sealed woofers in a bandpass box. If it is only more volume you are seeking, you can overdrive your speaker in a sealed box by approx 10% if played in reasonable intervals to allow the speaker time to cool.

 

nothing really specific.. just wanted to see if it would be a bit louder.. i seperated my box so far and put a port in both sides.. and like you said.. its muddy.. not as accurate.. soo most likely i will be going back to the sealed.. but i was just experimenting.. not harm done.. i have another question though.. i wass playing some music and cranked it up a bit.. it stated to cut out on really low notes.. what is that caused from? could it be my charging system? cause this was at idle.. Speaker wire i.e. Size?... would the specs of the box make it do that? or is it just because i was giving it too much?

 

if it cut completely out it was most likely the overcurrent protection in the amp assuming it is a decent amp...if the subs didn't blow up...you might consider a more powerful amp. i have always favored mtx amps as they are extremely durable and really under rated. you didn't have that happen until you ported the box did you? i would think not..the speakers may have also reached full excursion which would look like a short to your amp and also cause the overcurrent condition..also a result of porting (or too much port)
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i never asked...what are your subs anyway?

 

LOL,Hey Bandit had sumthin like that happen ta me awhile back.When ever the subs REALY hit every so offten it seemed like the sound would cut out.Turns out the mount to the back my head unit was loose and the vibe from the sub hittin caused the unit to skip or loose it's place for a sec.No lights went off<ie.power loss<and watched the protection light for over driveing ,as Funkdubie mentioned a good amp has such protection,and it never flucuated lit up.The clipper light was in over drive on that part the muzak thu.Thats when i sat back down and tried it again and then tapped the console.It did it in a non-bass section on another cd when i hit the console.So i popped it out and found the loose mount.Tightened it up and no probs again.
Also if it continues check yer connections,ie.grounds.Ya may have a 1/2 butt ground sumwhere.Ususlly if ya draw too much power for whatever reason the unit usually blos a fuse.Unless yer alt is realy underchargeing.Then ya will or should notice lights dim on bass hits.Thats why i went to the cs-144 the alt i just rebuilt puts out ,according to autozone this morning,136 min amps at idle.
Have fun and use cotton if yer ears start ta bleed.

 

weait.. if i have hte low pass crossover set a little higher.. will it not play lower notes.. like real low.. this could be my problem.. just my ignorance

 

so im out there replacing some speaker wire.. when i wanted to try to figure out why its cutting out... i had Young Jeezy - Soul Survivor playing at a littel over half way.. now.. it was cutting out .. so i went around to the back.. and for the hell of it i covered the ports with my hands .. gone.. they kept playing no cutting out.. so my question is.. is this possible? or how is this possible? the ports would make it not play and cut out?

 

The enclosure changes the way the woofers react thus changing there impedance. A ported enclosure can really bring this out. What could be happening is the port is causing your sub to draw more current than it traditionally would. That or flat out soft bottoming over excursion are about the only thing I could imagine causing your problem beside wiring issues. What ohm are the subs, what amp do you have, how's it wired up?

 

subs are dual 4 ohm.. wired in parrellel to 1 ohm.. on a mono channel memphis amp.. thats stable at 1ohm.. i made sure of all this before buying it all.. soo it is the porting job.. the ports arent the right size atm.. just wanted to see what it would sound like.. but im getting rid of them.. and i think ill stick with the sealed box

 

Now when ya ported em did ya sink tubes or just make the holes??If ya just make the holes then i have seen subs just go flat because they cause the box ta expell too much air from the box too fast not realy causeing a vaccume, but for lack of a better way to put it, not leaving enuff resistance for the diaphram to rebound or flex right and it just sort of goes flat till the enclusure sux in more air.Kinda like gettin the wind knocked outta yourself.
Subs need to breathe to an extent.Slideing in tubes the right length and diameter keeps some(what?)back pressure for lack of a better word.As well as the right diameter and length keeps ports from "singing".Almost whistleing when the air is expelled.

 

yeah there about 1 inch from the bottom.. im not suure how big that is.. the tubes go down about a foot i guess

 

Ok they are 1 in from bottom.How big around arew they?Try the links I put in one these threds for audio.Theres a prot calculator.Sould give ya the circumfrance or diameter(I forget which is which)And the deph they should go or in other words the lenght.It'll be aprox and ya always cut longer so ya can cut it shorter if ya need to.Not like they stretch.Or ya can just say the heck with it.LOL.
Heck my sub cut out today on the way home from work.I mean Sabbath sweet leaf was bangin and then it was all mids and highs.Thought what the heck????Thought i'd blown a fuse or hit the overprotection or even smoked sumthin.Turns out dummy me knocked sumthin inta the EQ and hit the sub button and just cut the bass to the amp.DUUUUUHHHHHHHHH.

 

you didn't have that happen until you ported the box did you? i would think not..the speakers may have reached full excursion which would look like a short to your amp and also cause the overcurrent condition..also a result of porting (or too much port)
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i never asked...what are your subs anyway?


previous post..covering the port doesn't allow the sub to move as far..

 

ok first you say you dont think its when i put the ports in.. then you say the ports are making it reach its excursion......... yes it happened when i put the ports in.. never had happened, no matter how high i turned the volume when it was sealed.. uhhh there kicker compvr's dual 4ohms

 

I read back thru and think actually funky recomended not ta port,And said the loss maybe due to porting.I haven't had any trouble outta me petra box being ported and plan ta experiment with the single infinity setup box hopefully this weekend.(no matter what i do it only hits clear thump off of non-metal/rock.)But the old petra set up does fine on all tunz.The infinity does great off NWA or anything like that.But pop a zombie or Sabbath cd and theres too much bass guitar for it to handel.Like i need to filter down past 40-32 hz.Which is the next plan.To build my own passive x-overs.And insert em B4 the amp.

 

ok soo to update this whole thing.. im gonna build a new box, 2 seperate ones that go higher so ill get more air space.. then ill put the correct port size they reccomennd.. just gotta go get the wood today and get the box built.. any one want pics?

 

sure pix always can use pix.

 

i wanted to make bigger boxes cause i feel that the well box.. split down the middle, isnt enough air space.. it seems very small.. im gonna make a bigger one.. which i can always close up

 

Small??Shoot mine takes up all my storage space and hammers real nice even with just the 1 infinity sub 12" in it.Weighs a damn ton too.Still thinkin about dropin in the petras and makin it a dual sub box.Seperateing both sections.
I have seen both on here and in person a box that was like ours and also ran up on the top the hump all the way to the back the beat it was about 6 inchs taller.Basicaly just missed the glass with hatch shut.It had 2 12 inshrs and was ported up by the back seats up on the hump.Dude showed me pix of the inside . Looked like a maze in the section up on the hump behind the seats.Looked heavy as all get out too.Too much crap for me.

 

hmm you wouldnt happen to have those pics..? or know the guy, can you get those pics? im almost positive i know what your talking about.. pics would be awesome if you can get them.. cause this could be a possibility of what im gonna do