15 replies to this topic

[Snowfruit]

I have two (or will do as soon as they arrive) JL 12w0 subs. The plan was to fit one and sell th other. However, they're such nice subs I was wondering, is there any point, or even enough space, to fit two of these in a mini? I was considering building enclosures for them into the bins beside the back seat... will there be any advantage to having two over one or just plain over kill?

Also, would one amp drive both, or would I ned two of those also? (I havent bought any amps yet, nor components for the front... still looking)

[THedooBZ]

nice purshace there, the only problem is the volume of the boxes they need. if you keep both then you would probably end up with little or no rear seat space, the rear seat bins just arnt big enough for the sub to perform properly. check this link for ideas.. http://www.cardomain.com/ride/210732/4
there is no real advantage having one or having two its just personal preference and the more bass you have the more components etc u will need to balance the sound.
you could get one amp to drive both but it would need to be powerful and probably expensive. i would say that jl probably do an amp that is matched for those subs so i would check their website.

[philster]

You could run both but you'd have to lose the back seats, for JL's to perform they need massive enclosures, its the price you pay for a good sounding sub though.

The new W1 range of subs uses smaller enclosures.

[mini_basser]

I can't imagine they'd need more than about 1cuft sealed (obviously check the PDF on the JL site to make sure) Shouldn't be *too* much hassle getting that around the rear bins (will probably encroach on the seat a bit)

Personally, I would put one in the biggest ported box you can fit in the boot

[philster]

The box size for the 12w0 is 42.5litres (1.5CuFt) for sealed and a mahoosive 70.8litres (2.5CuFt) for ported.

Personally i'd use 1 in a ported enclosure, i did one of these a few years back for a mate using a ported enclosure and it was astounding.

manual 12w0

[mini_basser]

Ah right...that is a little on the large side for sealed. I wouldn't put most subs in much less than 2.5cuft ported though...rumble rumble

2.5cuft isn't easy in a Mini boot...unless you get clever with the design and drop the spare

[philster]

I had a box in mine and the biggest i managed to fit was 59litres, with the spare wheel out i could have got more but it would be a b****rd to move.

[chairchild]

could use both, and run them in an isobaric configuration?


at least then, when you run them in a ported box, it'd only need to be 1.25Cuft - which is less than if you used one in a SEALED box!


you could even use some wadding, to bring it down to 1Cuft, with ease

[mini_basser]

How exactly did you figure that out Chairchild?

[chairchild]

the whole point of an isobaric setup, is to use half the reccomended volume for the sub - so if you have them in a ported box, you can use half of the reccomended 2.5Cuft that you're supposed to put them in.

Also, with careful use of acoustic wadding, you can make the sub "think" that the space it's in is 1/3 bigger - but realisticly, it's better to think that the sub sees it as 1/4 bigger at most, unless you know exactly what you're doing.

My guesstimate was if it reduced the required volume by 1/5 - since I'm not entirely sure how it'd work in an isobaric setup, and wether it'd be as efficient at doing the same job if it was in another configuration

[philster]

wouldn't the wadding only work with a ported enclosure CC?, i can't see how it would affect a sealed box due to the fact that it can't alter the air flow within the box because its got no-where to go, so surely the wadding would only decrease the volume.

I've never been convinced of this myself.

[chairchild]

hehe - philster:

at least then, when you run them in a ported box, it'd only need to be 1.25Cuft - which is less than if you used one in a SEALED box!

[mini_basser]

Sorry...I thought I was going to prove you wrong, but it appears I really do know sod all about isobarik

I'm not sure if wadding can add as much as 1/3 to the perceived volume of the box...though I can't find any actual figures

Philster: it definitely does effect the way the sub behaves in a sealed box It's mainly that is slows the air down (obviously air moves within the box due to the subs excursion) thus making it appear that the box is larger

[chairchild]

I was told of the 1/3 figure by LardySBC (a minor deity in the ICE world!)


lol, so I hope it's true!!

[mini_basser]

Used to chat to Lardy a bit actually...havn't seen the fecker online in ages though!