working with about 1.5 ft^3 and 1100 rms!

Ok, i currently have 2 RE se 12"s being pushed by my kenwood excelon x-811d rated at about 1100rms@ 1 ohm. they are on my backseat in 2 temporary boxes each about 1 ft^3. I drive an ext cab 02 chevy so there is no room for these so they must go. Now i am satisfied with the sq and spl im getting from them so i need either 2 or 3 10"s that will give me the sq and spl to match those(or better)  from an enclosure no bigger than 1.5 ft^3. Im' building a console and thats how much room i have to work with. I listen to everytype of music but country and im aiming for an sql type system. im considering either 3 alpine type r's or 3 image dynamics id10s. im willing to spend about $100 a sub. PLEASE HELP, I NEED A PERMANENT SYSTEM

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My vote goes to ID.

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My vote goes to upgrading the main speakers.

Put in a single 10 or 12in sub that matches evenly with the mains

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you cant go wrong with either sub i think, but as far as better sounding the ID is gonna sound way better and they are both gonna be equally as loud,

hey now poorman, lets not make any assumptions here, we all know your sq obsession. I already have a set of alpine spr-17ls components up front pushed by about 70 wrms from an oldskool kicker impulse amp. i also have a set of eclipse 4x6 coaxials in the rear. now i need my bass! the problem im worring about is will i be getting the same spl as my REs, because if i run 3 ID's dual 4ohms in series parallel, it'll make the total resistence 2.67 which would be just about right for those subs. The amp does 919 wrms @2ohms.  But if i ran with three dual2ohm type rs for a resistence of1.33 ohms, they will be getting less than 350wrms a piece i think. they can take 500rms each. Also i want the enclosure to be as small as possible, and i dont know if those type-r's will sound good in smalll enclosures

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You don't have enough room for a vented enclosure, so you're talking about .5 cu ft per 10" sub sealed.  You will certainly have loud but you won't have the low end response that you're accustomed to now.  The three Alpines would probably hit F3 in the mid 50 Hz's.  For the SQ you are looking for you will want to hit at least 40 Hz before getting to F3.  I'll agree with Poorman's single sub in that space and you can work with any sub you like, sealed OR vented.  Well, of course except for the monstrous power handling capacity it will have to have!   But then again, you really don't need to put a 1 ohm load on that amp...?

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

What do you mean by F3? thats a new one to me. And if i can get my current spl and sq with a single sub, then hey sign me up, but what would you recommend?

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F3 is the term used for the -3 db point, where the output curve slopes downward on the low end.  -3 db is literally half the output of the reference point of the curve, and so is considered the bottom end of the frequency response (more, and here) .  F3 is looked at when you are designing a sub enclosure and are trying different drivers, box volumes, tuning ports, etc.  The higher freqs like the 50's is great if you're building for SPL because you'll not be wasting power in lower freqs.  All the power gets transferred to the car's resonance frequencies and you can probably score higher.

But for anything linked to the term SQ (a.k.a. what you would want to listen to while driving), it wouldn't be acceptable, at least with the music that we have today.  There are a lot of vital freqs lower than 50 Hz.  SQ is a relatively flat response throughout the sub freq range so that the vehicle resonance itself doesn't play a huge role in the overall sound.  It would be the sound quality of the enclosed sub that you hear, not so much the combination of sub sound and vehicle resonance.  So you'll want the sub to perform at the lower freqs smoothly and allow those low freqs to play powerfully.

As far as I'm concerned, you have to decide whether you want to build for SPL or SQ...there isn't a both.  With a DVC 4 12" sub wired to 2 ohms, you could build for SQ.  With the rigidity that you need to build into the enclosure and the driver displacement, you should have around 1 cu ft or a little better to work with as air volume.  There are a lot of choices in subs with this criteria, and power handling should be about 500 watts.  That would open a much bigger door for you in sub selection than trying to find 2 or 3 10" subs that will give you a full range in that space.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

ok, well sq is definately more important for me, although i still enjoy some breathtaking bass everynow and then(helps clear my sinuses). I was runnin a single 12" RE se for a while but i wasnt happy with it, thats why i got 2. And I need to run 10"s in this console, nothing else will fit, without tuning the sub at some goofy angle. And thank you for the elaboration on F3, i knew what is was, i just didnt know it was called F3. This will be fiberglass and i can chamber it if i run more than one sub. I can do vented too.

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so if i went with just 2 tens, would i be better off?

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Sure, you don't want to have a screwy-looking crooked 12" in there.  A  quick glance at the IDQ10 looks like a good match for your project.  A pair of the DVC 2 ohm will give you a total 2 ohm load on that amp for the right amount of power input. 

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Ok, ive been doing some more research and im lookin at the Elemental Designs 11kv.2. Its in the right power range, and likes small enclosures. i'm thinkin 2 or 3 of these will do it. I was listenin to some rap this weekend and realized that if i lose the volume i have now i'm gonna be unhappy.

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Has anybody heard these subs before?, if so what can you compare them too?

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