i've never messed with multiple sub setups, i had a single 10 in my truck in high school that has been sittin in my room the last 2 or 3 years. i have another matching 10 still in box that i never got around to putting in my truck and since now my dad is pretty much using my truck all the time for runnin the mower around and hauling scrap sheetrock from his job sites i've given up hope of getting it out here to work on and fix it the way i want. as a result i have decided to put the subs i had for it in the cavalier since i don't use my trunk at all except for when i make trips home.

so hears what i have:
2 10" 400W peak, 120 RMS subs
1 760W amp
1 box of roughly 1.2 cu ft cut for 1 sub

the recomended volume for a sealed box for this speaker is 1 cu ft (i know the box i have is too big but it was only $20 and fit behind my bench seat perfectly).

since i never had multiple subs in one box my question is:
do i need a box of 2 cu ft volume or can i make the box i have work by sealing the front with another sheet of plywood and cutting 2 new holes in it (the front of the box is like 40" across if i remember correctly)?

10/12/2005 12:29:02 PM

you can just add a new front to it, but you loose range on the subs. It is not an advisable way to do things, but for cheap, it will work.

10/12/2005 6:38:39 PM

the range is not my main concern, these are just cheap pioneers that sound good enough for me. i just wasn't sure if when making a box for 2 subs it was better to add the necessary volumes or stick with 1 ft, or close to.

10/12/2005 7:39:49 PM

its just pioneers, if your gonna seal them, then dont even worry too much about the size, just keep it as close to 2.4 for both as you can. or make 2 boxes. these subs are fun and beasts though. abuse them and use them. if your gonna port them then that is a dif story.

10/12/2005 11:50:10 PM

well, the recomended is 1 cu ft for one sub, 1.2 is the vol of the box i have that currently only holds one sub. so i guess you're saying i really need a box of 2 cu ft or to 1 cu ft boxes, right?

10/13/2005 12:00:48 AM

yeap, if you listen more to rap, go for like a 3 cu ft though
more for rock try a 1.5 cu ft
if you can fit it. sealed dont really matter tooooo much. it changes the sound a little, but its much more about fitting it as best as you can. the smaller the box, the tighter the sound, the bigger the box the boomier the sound. but the reccomended size is usually the best of both worlds or medium size. one warning, if you make it one open box, and blow one sub, and you dont notice, you suddenly are trying to push the entire box for both subs, with one sub, and you can end up blowing both. so some people go that extra mile and divide the box even if it is one box. for my speakers, (i have 3 kappa perfects ported) i built 3 single boxes, and then rode around for a month or so seeing what setup was the best, then put them all together and finished them.

of course, some one will argue something here, as is the t dub way.

10/13/2005 1:57:31 AM

thanx, i am aware of the concept you're refering too, i just never worked on multiple sub setups and figured i should check. the setup i had drawn up for my truck was two seperate boxes anyways cuz that was the easiest way to fit them between the bucket seats. since this is goin in the trunk where space isn't nearly as much of an issue i just figured a single box would be easiest. i'm not really going to be pushin these things hard so i doubt i'll blow one, but ya never know.

10/13/2005 10:59:46 AM

ah, a sealed box and a ported box are completly different. The operating principals and physics are completly different. I won't go into the physics, but basically:

1)sealed box:smaller (usually around a cubic foot), not as loud, woofer more controlled, "tighter" sound, can cheat the power to the woofer more (give it more power than ported), if the box is too big (3 cu foot is way too big for sealed), you'll probally blow the woofer. almost no math to build

2)ported box:larger, louder (sound come out of the ports), woofer has less air preassure to hold it in place, so you can't give it as much power and it isn't as clean a sound, Must build the box right for it to be "tuned", if you give it too much power below the frequency the box is tuned as, the sub offloads, and you have overexcursion (ie blown sub)

read this page, a little technical, very informative: http://www.diysubwoofers.org/

Edit: oh yeah, and do seperate the sub chambers. There is no reason not to, plenty of reasons to.

[Edited on October 13, 2005 at 8:10 PM. Reason : because]

10/13/2005 8:09:55 PM

i am well aware of the differences, i used to play with this shit all the time in high school, i just never did multiple sub setups, in my opinion, sealed is the best way to go, i prefer tight, clean bass.

10/14/2005 1:38:27 AM

^^ i shook my head when i read that

yeah its all about your preference, but what ever you do, do it first for the shape of the trunk. you want it to fit in your trunk as well and as deeply as possible. btw, you should only need it to be 27 or so inches wide, maybe less.

[Edited on October 14, 2005 at 8:07 PM. Reason : 4]

10/14/2005 8:06:22 PM