What if an enclosure is too big for the subs?

[Jessica]

i see 6 squares on the baffle, so i think they are 4" square squares. That would work with the cutout size of the XL 15 as that would be almost 12". and the OP said 42X24, so i think when he said the port is 21" long he meant 21" tall.

Although if he would just grab a tape measure this would be easier, but less fun.

[Jessica]

That sounds about right. Now we just need a DC expert in here to know if that's too much space or not. I know a lot of DCs kind of like smaller boxes. So if a sub that normally likes 2.5-3 cubes will safely work in 4.25, it may not be an issue at all.

I'm really just guessing at this point, but i think that box may be 10 cuft. at least thats what sketchup tells me. but i don't know the actual port length. I can tweak it a million ways but it wont matter. lol

[ChevyBoy95]

if it is really 5 cubes per sub, i would build a new box. 60 bucks for wood is nothing compared to possibly ruining the soft parts of 800 bucks or more worth of subs.

They need around 3.5 cubes each (3.25-3.75), 33-36hz tuning, 12-14 sq in of port, and you will be good. I had some XL m1 15's and were on nendo 2ks and could never get them warm.

People have triple joint issues because they throw 3x rated power at a sub and then blame the sub, and somehow dont realize the spiders are smashing against the top plate....

[Ektro]

Well $60 in wood and $100 for him to build (because he'd need supplies, labor, and to design a new box) so I'm kinda SOL now because I have no more money.

[kirill007]

This is the reason why not to buy the most expensive woofers you can buy, because everything else will be lacking.

I would tell the builder to rebuild it according to specs and you will only pay for 1 box since he screwed up the first one.

Free designs are usually not worth it..

Atleast not if the designer doesn't ask 1 million questions before designing it.

Show us the "design" someone made, and add in what car/amp/subwoofers/goals/...

[Ektro]

I am still working on the amp!

If CT Sounds 4000w is cheaper then DC 5k going that route for the 2 XLs.

I'm just slowly trying to piece together everything I need but money is super tight. I probably won't be able to come up with $160 for a new box. Plus I'm feeling like crap now for making him build the 1st box because it was such a piss poor design.

[Ektro]

This is what we were trying to build the box off of.

[hispls]

I think you'll find that most manufacturers "recommend" box sizes that are as small as possible as a marketing gimmick. It's far easier to sell a 15" woofer if you tell buyers that it'll work in 2-3 cube than if you tell them it'll want 5-7 cube to really get loud. Your average knuckle dragger that throws tons of money at this stuff wants as much cone area as possible, isn't willing to sacrifice space, and is easily impressed by inflated power handling claims.

I'd wager few of the people saying "you'll break the sub" have ever actually ran a 15" woofer in 5 cube. Assuming your tuning is right, I'd guess that the box will be fine. You may be a little peaky around tuning (but not knowing the peaks and nulls of the vehicle this may or may not even be bad) and you'll gain some efficiency. Generally speaking 25% increase in box volume is not going to be particularly dramatic. Correct tunning, sufficient port area, and solid construction are far more important in my book.

IMO if you're mechanically breaking a 15" woofer in a 5 cube box, you're being a total arsehole playing way below tuning or the sub isn't built properly. I'll go even farther and say that triple joints should be about the last thing to break if the sub is build properly with good quality parts and glues.

[Ahmed Johnson]

I got a 7 cube box for some 15's we could trade

[kirill007]

I think you'll find that most manufacturers "recommend" box sizes that are as small as possible as a marketing gimmick. It's far easier to sell a 15" woofer if you tell buyers that it'll work in 2-3 cube than if you tell them it'll want 5-7 cube to really get loud. Your average knuckle dragger that throws tons of money at this stuff wants as much cone area as possible, isn't willing to sacrifice space, and is easily impressed by inflated power handling claims.

I'd wager few of the people saying "you'll break the sub" have ever actually ran a 15" woofer in 5 cube. Assuming your tuning is right, I'd guess that the box will be fine. You may be a little peaky around tuning (but not knowing the peaks and nulls of the vehicle this may or may not even be bad) and you'll gain some efficiency. Generally speaking 25% increase in box volume is not going to be particularly dramatic. Correct tunning, sufficient port area, and solid construction are far more important in my book.

IMO if you're mechanically breaking a 15" woofer in a 5 cube box, you're being a total arsehole playing way below tuning or the sub isn't built properly. I'll go even farther and say that triple joints should be about the last thing to break if the sub is build properly with good quality parts and glues.

Oh really? It's not dramatic when you are tone deaf or maybe if it's a small sealed enclosure, but the difference between a 7 cubic ft and 10cubic ft box will be very dramatic even with the same tuning.