I might take on the challenge.
 

Ok, so I just picked up my new aveo (hatch). MY SNOWBOARD FITS! Haha. Now that that is out of the way, I think I want to fit my two 15" cvr's in the back. I did some measurements and if I made a box with out crazy angles I would be able to get the minimum recommended air space for each subwoofer (1.8 cubic feet). What would be the downfalls for this? I know my low lows will be gone but they are 15 inch subwoofers and they should still be keepin up with some 12's in an average sized box am I right (I am talkin about the low notes)? Plus, the smaller the box the punchier the bass, and I listen to a lot of techno so punchy bass is good. What are your opinions? Do you think it is stupid for me to do this or do you guys think it could turn out good?

I want to do this not cuz I want a lot of bass (I think I could make one 15 sound as good as two 15's that are in a tiny box) but it would be awesome to be able to open the hatch and BAM! people aren't expecting to see two huge subs in a tiny fricken car.

The ole' trusty "wow" factor... I think it'd look pretty cool. Since it'll be sealed, I don't think hitting the low notes will be much to worry about - output obviously won't be tremendous, but at least it'll look cool, right?

holly... that should be loud

Do it!!!

your subs are gonna be bigger then your rim's

panda style box fo sho

Hahahaha, that is hilarious. I never thought of it that way lol.

So it looks like most of you agree that it would be cool to see me some how fit them in, do you guys think the sq will be sufficient enough for me (I am not a HARD CORE sq guy)?


And Worldind, when you say "output" do you mean loudness or what are you refering to?

Yeah that's what i meant, although since the cabin is so small, the fact that they're sealed and in a small box will probably be offset a fair bit... I guess we'll soon find out!

How about this, which one would win...

SOUND QUALITY
(choice 1) Two 15's in a 3.5 cuf sealed box
(choice 2) One 15 in either sealed or ported box (>3.5)

LOUDNESS
(choice 1) Two 15's in a 3.5 cuf sealed box
(choice 2) One 15 in either sealed or ported box (>3.5)

Opinions?????

As for loudness, I'd put my money on throwing all your power into a single 15 in a nice fat ported box... and I mean fat as in Aveo terms, so like ~3.5 cubes or however big you can make it.

i would like to see 2 15's in the hatch of that little car lol..

watch your altinator on that car..It could be as small as 60 amp

I'd run them clamshell isobaric in a 2cuft vented box :smokin:

http://www.raysmith.co.uk/images/ray/ported2.jpg

To do that and still get the "wow" factor you would have to make a big part of the box out of plexiglass so people could see the other driver.

Also doesn't isobaric give you the same amount of out-put as a single sub, but you'll naturally still need 2x the power to run both subs?

Since not many people run isobaric these days (and a lot of people don't even know what the heck it is) I think that would give you a great wow factor.

what!? It looks like they would cancel each other out if they were done like that???

you have to make sure you wire one sub out of phase or yes thery will cancell each other out.

So what exactly does the "clamshell" thing do? Just make things louder? How is the sq compared to a sealed box?

id probably just build a sealed box as big as possible and then just add a bunch of polyfill to it, then put it in and see how you like it.

yea and do you know the size of that alternator? and did you ever think about the suspension in that little thing :cheeky4:

I was reading on the chevy site and it has an 85 amp alternator AND THAT IS WHAT MY QUESTION WAS WHEN I WENT TO MY CARAUDIO STORE! DAMNET! I was trying to remember to ask them if they could put more coils on my alternator. That is like a 15 minute drive to the store. Ah, ohwell. I probably won't get to the subs/amps for another month but the HU will probly be going in this weekend. And that poly fill thing is a good idea. Is that stuff expensive?

Running 2 drivers in a "clamshell" or "isobarik" setup lets you use the drivers in half the space a signle driver would normally use. So a single sub that usually needs 2cf sealed could would work the same in a 1cf sealed box if 2 drivers are clamshelled together. It works identically the same for ported boxes, bandpass boxes, etc. All box volume requirements are halved when a pair of subs are used isobarikally compared to a single sub.

The downside is that becuase you dont have any additional cone area from using the 2 subs, efficiency stays the same, assuming identical power input ("x" power for 1 sub vs. "x" power for both subs isobarikally).

Another advantage is less distortion, because one of the drivers has to be wired out of phase, some distortion ends up cancelling out.

Nope go to walmart and pick some up....

Dukk... you are trully a sick f$#k...lol... tuned right with about 300-500 watts RMS that iso box will make the doors on the little car flex an inch... that is the best idea I've heard on here in a long time
go iso.. and tune it to about 30hz

So I can use that clamshell thingy with a sealed enclosure? I think this is the route I am going to take. I would rather have a good sounding subwoofer(s)more than having the "wow" factor so I don't really care if only one is showing. Actually, I might as well say that this is definetly the route I will take. So, it uses two subwoofers and the power to run two subwoofers but it is only putting out the sound of one subwoofer in a good box? That sounds like a good idea to me.

But, I was thinkin about it while snowboardin tonight and I realized that it might be better if I run only one 15" while I still have the stock alternator. Two 15's will not be good on my stock electrical system. But, when my alt is upgraded I will be switchen to the clamshell thing.

Viperoni is correct. Running Isobarik (there's a few ways to do it) makes it possible to run the woofer pair in half the air that one driver uses.

So with the box I suggested, you would get the sound and output of a traditional single 15 in a 4cuft vented box which should pretty much loosen your fillings :smilie_da

I'd go bigger, drop it in as big of a box as possible, tune it to 30-35hz, and it should slam nicely :)

Awesome. I think I will go with a 1.6 cu feet box for this because that gives me 3.2 cubic feet in reality and that is what I was shooting for on my last box design. 5 cubic feet for each sub sounds really nice but kind of sloppy. So if I would set it up in this way I will be pullin the same amount of amps from my electrical system as I would be if I was running them both facing out of the box right?

^ That's correct. nothing changes as far as the amp is concerned.