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Discussion Starter #1
For two 12W6V2 JL Audio subs in the back of a 156 saloon. For some reason on rap music my subs seem very boomy I think it's down to the box more so anything else. And really it sounds bad due to it not having low end thump if that makes anysense. It just sounds hollow. Is there any box deisgns out there that will fit into the back of a 156 and make it sound better.
 

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AO Silver Member, 155 Lounge Winner 09
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What's your current box design? I'm guessing 'too small'.

If space is an issue, you are possibly better off with 1 sub, but in the optimal enclosure.

Can't remember if we discussed designs before, but on modelling the specs, I would recommend:
*'sealed', 1.5~2.0cuft nett internal volume per sub
*'ported/vented', 2.5cuft nett internal volume per sub (maybe build to gross volume of 2.7cuft to allow for port), with a port tuning the box to ~30Hz (eg: single 4" diameter cylindrical port x 12" long (eg: pvc plumbing pipe))

Presumably wouldn't want 2 subs with boxes of those size in the 156 would losing all your boot space.

What sort of music do you like?

:)
 
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Discussion Starter #3
http://i4.photobucket.com/albums/y122/damof/Image0190.jpg

That's the box there. I dunno it's specs at all. I got someone to build it for me but I don't think they did a great job. Buddy of mine has a wall SPL set up and it sounds better than mine which was meant to be for SQL. I literally listen to everything. If they made a double JL HO box I'd buy it cos those boxes sound great. I bought another sub due to the fact that the back of the 156 is sealed.
 

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AO Silver Member, 155 Lounge Winner 09
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The box - ported - looks no bigger than 2.5~3cuft in size...and that's for 2 subs. It is probably 'choking' them of performance.

I reckon you'll be better off with 1 sub, in the right sized box, which will be of similar size to the box you already have. I presume you don't want a subbox (or two) that are around double what you already have?

Don't be reluctant to have just one sub. With enough power, and particularly in a ported box, the W6v2 can go very loud and low.

:)
 
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Discussion Starter #5
Oh I know but I have two now lol. And I bought it specifically so it would only be wasted as it's valueless to sell over here. I honestly haven't a clue about boxes. I don't care how much room it takes up as the car isn't used for shopping etc so all I want is to make it sound better. And have a proper deep bass hum off it. There is a JL Audio 750/1 HD amp running the subs.
 

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AO Silver Member, 155 Lounge Winner 09
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I would recommend:
*'sealed', 1.5~2.0cuft nett internal volume per sub
*'ported/vented', 2.5cuft nett internal volume per sub (maybe build to gross volume of 2.7cuft to allow for port), with a port tuning the box to ~30Hz (eg: single 4" diameter cylindrical port x 12" long (eg: pvc plumbing pipe))
I honestly haven't a clue about boxes. I don't care how much room it takes up as the car isn't used for shopping etc so all I want is to make it sound better. And have a proper deep bass hum off it. There is a JL Audio 750/1 HD amp running the subs.
If your music tends to be more 'low and slow' (rap, classical, etc) then I would go ported boxes. If your music is more fast paced and not so low (metal, etc), go sealed.

The sub suits either, and will perform really well with either. Ported has the advantage of being a lot louder and playing the really low subbass louder, because the box design is more efficient; disadvantage of having slightly more 'lag' compared with sealed, esp with subbass below 50Hz. But the box needs to be big enough, and the port long enough; your current box looks too small, and I've no idea what the port length is.

5cuft worth of subbox is seriously big and heavy. You'll probably need two separate boxes built, and even then of careful design/dimensions, because it otherwise won't fit through the opening of the boot. But again, I would personally have only ONE sub in a ported box, because I think that's big enough and loud enough. Only if you're wanting to doof doof down the street letting everyone know you're there, would you really 'need' to run 2 subs, ported.

Who will make the box for you? Sounds like you'll need to enroll the help of an experienced friend or specialist ICE store. No point talking about it if you can't actually have it done. ;)

:)
 
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Discussion Starter #8
Myself and the buddy can build it as his car is booming at 150+db he's got 2 18's in a wall lol. Emm I'd say it's going to be tricky all right to squeeze the box in. As I said it'll be two as I'm not just leaving one of them in my room to gather dust. I can measure the box for you not a bother. What kinda slot would rec?
 

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AO Silver Member, 155 Lounge Winner 09
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Slot ports are very time consuming to design. It depends on the exact dimensions of the box you start with, so I can't really suggest how wide/tall/long to make it without knowing the specifics.

As such, it's much easier to add a cylindrical port using pvc plumbing pipe. Cheaper, easier, more predictable in design. Mentioned it earlier. ;)

:)
 
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