How big of a box will fit in your trunk?

[dirtysmurf]

How big of a sub box do you have in your trunk? did you have any problems getting it in there? how big is the bigest that will fit?

[matts]

if you build the box in the trunk you can fit a pretty big one in there. right now i've got a 3 cu. ft. box for a 18" in my girlfriends GA and it wasn't easy to get it in there, but that's because it was about an inch too tall. im going to build her about a 4.5 cu. ft. (i think, i haven't really done the math on it) to go in her trunk.

[nineteen88ga]

We were able to get a 3 sub box in the trunk of my friends g/f's 92-95 GAGT. Had to do a little persuasion with a mallet and an air saw, but it fit in like a glove. I'm not suure of the dimensions of the box, but I'm going to say it's about 1 cu.ft per sub. If it helps any you can go to www.audioenhancers.com to see the box we used.

it was a Tripple 12" sub box.

[matts]

lol. sounds like the box thats in my girlfriends trunk. i took the plastic trim piece off and tapped it in with rubber mallet. getting it in was easy compared to what its gonna take to get it out. lol. i guess my good friend "dewalt sawzall" will give me a helping hand.

[GrandAmgurl516]

I have 3 10" subs in the back of my 95 grand am, and it fits in there perfectly! I'm not sure what the measurements are but you get the idea anyway! :D

[LuckyT]

I was able to fit a 4 ft^3 box in there with no problem, I made a 5.5ft^3 box and had to put it together inside the trunk.

[BloodRedDimond]

I have a duel box in my trunk , with the two 10s in it , i dono demmsions , but theres just a lil room on each side , o and advice , turn the box so the speakers face inside the car , and put the seats down if you can:agree: :P

[sound_xtreme]

I think mine was 7.6388888888888888 cu ft

dimensions were for a fact 37.5w x 22l x 16h

In our thunderbird we fit 10.5 cu ft measuring in at
36 x 36 x 14

[matts]

Originally posted by BloodRedDimond
I have a duel box in my trunk , with the two 10s in it , i dono demmsions , but theres just a lil room on each side , o and advice , turn the box so the speakers face inside the car , and put the seats down if you can:agree: :P

but that really only sounds better if you keep the seats down all the time. with the subs facing the back of the car you get a longer soundwave, which will sound..........better. i don't know how to explain it really. the first time you put the seats up for someone to ride back there your sound is going to suffer.

[matts]

Originally posted by sound_xtreme
I think mine was 7.6388888888888888 cu ft

dimensions were for a fact 37.5w x 22l x 16h

In our thunderbird we fit 10.5 cu ft measuring in at
36 x 36 x 14

thats some big ass boxes. what kind of subs did you have in them?

[sound_xtreme]

I had 3 12's in my box Audiobahn alum 12's. and then I built another to hold 4 10's that exact size.

In the thunder chicken it was just for 2 DHD 12's hitting 160's

[R8DERHED5150]

Originally posted by matts
but that really only sounds better if you keep the seats down all the time. with the subs facing the back of the car you get a longer soundwave, which will sound..........better. i don't know how to explain it really. the first time you put the seats up for someone to ride back there your sound is going to suffer. I'm not sure what types of boxes you might be refering too, wether its a ported, bandpass, or sealed, but as long as you use a true sealed, shouldn't make much diff at all if your seat is up or not. But of course when you go overkill with big ass boxes and speakers, then you loose all the resonance in your trunk and yeah, you have to put your rear backs down to borrow air space from the cab. I am running 2-12" subs in a true sealed 3/4" thick box. I'm not sure of the exact volume, but I know it is exact for what the speakers call for. And I can't tell the difference when the backs are up or down. Inside or out. Oh another thing, for those who dont know much about boxes, if you want teh bass to be heard well outside, sealed box all the way. Band Pass if you dont want cops giving you problems.

[matts]

i'm pretty sure the box in my girlfriends trunk is 4 cu.ft. that i guess is what you're calling true sealed. it has no air leaks whatsoever. and it takes up most of the trunk. what isn't taken up by a box is taken up by amps, cd changer, etc. her sub was firing up and it rattled everything with the seat up. with the seat down it still rattled everything, but not as bad. so with MY set-up the stereo sounds better with the seat down. are you sure you don't have your boxes mixed up? i've had 2 12's in a band pass and it carried more than any sealed box i've had(with the same size subs).

[R8DERHED5150]

positive, I had a bandpass and it sounded like sheet. Went sealed and threw 3-4 blocks more. I only went sealed cause a co-worker swore by it that it would throw way more then what I had. So he kinda made a bet that if I wasn't satisfied with it, he would buy the equipment for what I paid for it. No loss trial? How could I resist. Now I swear by sealed.

[matts]

sealed sounds better than bandpass, but i still think bandpass carries farther. and sealed would stand a decent chance of actually having more dB than a bandpass. it's just my 2 cents though

[btchn1]

I will agree that sealed sounds the best, but in my opinion and the opinion of many, if a bandpass box is built correctly it is one of the loudest boxes you can build judging from the outside of the car. On any box building program, you can see any where from 3-9 db difference in a bandpass then sealed or ported. Now if you want to trick out a meter, unless you are REALLY good the ported box is by far the best way to go. Now I'm not talking a 4in tube x amount of inches long. I'm talking a 14x10 inch mouth x inches long. Now if you do everything right where you can have a port like this you have basically added a free sub to your system. Weird hu? Peace, Lee

[sound_xtreme]

lol, this is funny. it depends on the subs.....i used to sell ported only subs and they sounded IMHO better than any sealed application I have used. If i were to put those subs in a sealed box they would be nothing but a shitty sounding paperweight. And any ported box should sound better than a sealed as long as you build it RIGHT.

[sound_xtreme]

Originally posted by btchn1
I'm talking a 14x10 inch mouth x inches long. Now if you do everything right where you can have a port like this you have basically added a free sub to your system. Weird hu? Peace, Lee [/B]


what kind of sub you talkin about man? most subs will sound like shit like that. the only one that might sound good is the square kicker. port length x width x heighth are determined by the sub(or the user if he/she wants a different application)

[99GA]

port area isn't exactly determined by the sub....the port area determines the tuning.......certain subs can take more port area than others......but a lot of it depends on the cone area of the sub.......

hell...a lot of competitors use so much port area that the sub baffles are about the only closed part of the box.......looks almost IB

[sound_xtreme]

Originally posted by 99GA
port area isn't exactly determined by the sub....the port area determines the tuning.......certain subs can take more port area than others......but a lot of it depends on the cone area of the sub.......

hell...a lot of competitors use so much port area that the sub baffles are about the only closed part of the box.......looks almost IB

Those boxes are basically made for one Hertz. I am talking practical everyday use and still hella loud.

And one sub could sound awesome with a port 12x3x10 while a different brand could sound like total shit in the same box.

I have also seen boxes with no backs for the port. lol

[99GA]

one hz? it seems that you aren't very familiar with some audio terms...at least to me....not being rude or anything....but hz is a term used for frequency of sound....how many cycles per second...i believe....something to that effect...most boxes are tuned anywhere from 20hz - 50 or even 60 hz....

i never said that's not true about one sub sounding great in a certain box and another sounding horrible.....however....provided there is enough airspace for a group of subs in a particular box.....and if the subs are all about the same size... the tuning will remain about the same....thus...the port area can stay the same for a different group of subs.....see what i mean?

[sound_xtreme]

I know what hertz means.

by one hertz i meant they will have a very sharp peak and will be the loudest at a single frequency. That will sound like shit for everyday playing, trust me I have built boxes like these to win competitions but couldnt stand to have them for everyday use. YOU see what I mean?

You are right technically when you write it out on paper. The "tuned" frequency will never change for the box. But who cares? I am talking about which sub will sound best and to achieve that you need to change port size sometimes(not always). Try it sometime with a bunch of different subs that are the same size. I have took many subs that are the same size and swapped boxes, and i mean these subs are close. many things determine what will make a sub sound good in the box. Many of these factors are determined mechanically by the sub. what frequencys it physically can and cannot produce, the frequency at which it is loudest.....etc. I can make you some graphs of different subs in the same box that are close to the same size if you would like.

By the way, I use to do this for a living but decided education in something i enjoyed was more important.

[99GA]

well...you weren't very clear by sayin one hz.....it certainly doesn't come across as what you actually meant by it..

and the initial argument was that the specific woofer ALWAYS dictates port size...which isn't entirely true....what you want the box tuned to dictates port size more so than the specific woofer.....say what you want....but i could build a ported box....that would sound great with a great many different woofers....but not being built specifically for each driver....

as long as there's enough airspace for the sub....and the tuning is decent.....provided the woofer itself is decent.....the end result should be good....

[FalconXtreme]

well i fit a 36wX19dX17.5H box in my trun for my two 15s its like 5.1cu ft^3 but then 4.3cu ft^3 after sub displacement and port displacement.

http://gallery.caraudio.com/pp/data/2/7636subs_005-med.jpg

[R8DERHED5150]

damn Falcon, you gut that car or what? Wud up with the back dash?

[FalconXtreme]

yea it was gutted for about 5 days while i did the install. i made 6x9 adapter plates so i could put 6.5 speakers in their holes. and i had to take all the carpet out of the trunk cause it was 2 thick and my box wouldn't fit with it in( a tad over built hehehehe). slaps hard as a mo ***** though. anybody know how to get the spare tire well under cover to stop rattling?

[notoriousbrb]

the box in my 95 se is 36''x15''x14''.......it holds a 12 and 2-10's. the only way i got it to fit was by taking out my backseat completely...doin a lil cuttin and bending on the metal...and a lot of pushing....when i build my new box for my 2 type-r's, i'm gunna make sure it fits in easily thru the trunk and not by backseat

[FalconXtreme]

yea i had to do the same. good ole cuttin and bendin. but thats the best way cause thats the only way people will be able to steal ur shit is if they take ur backseat out, great theft deturent. but on another note, are ur 10's and 12 properly crossed over?

[notoriousbrb]

Originally posted by FalconXtreme
but on another note, are ur 10's and 12 properly crossed over?

i havent had 10's in the box for a while now...i'm just runnin a cheap ass jensen XS. i dont got the thing bridged nemore like i used to have it but it still slams

[matts]

i've always been told to not mix the size of the subs. i was wanting to put 2 12s and 2 15s in a car once. the shop that was going to do it said that they would do it, but they didn't recommmend it. something about this subs fighting each other.:???:

[notoriousbrb]

Originally posted by matts
i've always been told to not mix the size of the subs. i was wanting to put 2 12s and 2 15s in a car once. the shop that was going to do it said that they would do it, but they didn't recommmend it. something about this subs fighting each other.:???:

would they be in the same box?

[matts]

nope, they were each going to have their own box. i don't remember specifically why they discouraged it, but they did. so i just went with 2 square 15s:D

[FalconXtreme]

yea they would fight each other and the 15s would cancel out the 12s so it would of been pointless to have them. the only way to do it successfully would to have each set of subs in their own box(12s in one box and 15s in another) and then have each size sub playing only certian frequencies by using a cross over. thats y i asked if u had those 10s and 12s properly xovered

[notoriousbrb]

Originally posted by FalconXtreme
thats y i asked if u had those 10s and 12s properly xovered

yea....they were

[notoriousbrb]

Originally posted by matts
so i just went with 2 square 15s:D


if you got them in the same box....does it have 2 chambers?

[matts]

i don't have them anymore, that was a few years ago. yeah, they were in one big box actually, but it had a divider in it to keep them seperated.

[notoriousbrb]

Originally posted by matts
i don't have them anymore, that was a few years ago. yeah, they were in one big box actually, but it had a divider in it to keep them seperated.


o alright. cuz i was gunna say....i hate when ppl get subs and they put em in a box that only has one big chamber for all the subs. it's makes the sub sound and work so much better when its in its own chamber and its stuffed with polyfil...also makes it work better at a lower volume. if my box wasnt chambered off, my system would sound like shit because i only got the 12 in the middle and the 10'' spots on the sides dont have subs in em