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Reload Thread: Box for 12w7

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    Bumpin03's Avatar
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    Box for 12w7

    Does anybody know the recommended box dimensions for 1 12w7??



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    Just go to www.jlaudio.com and go to subwoofers and w7 and some where around there there is a link to a 12W7 spec sheet which has the JL recommended specs for the sub. I built my box (sealed) for 2 10W7s from that spec. I also built one for a ported 10 and i didnt like the way it sounded but it could have just been the way I put it together. Anyways make sure you use a double baffle, build the box extremely well, and make it very tightly sealed. Those subs make some serious pressure!

    ~Bobby



    Headunit: Eclipse CD8443
    Front Stage: Boston Acoustics Z6
    Rear Stage: Boston Acoustics Pro 6.5
    Subwoofer: Dual JL 10W7 Sealed Enclosure
    Mid/High Amplifier: JL Audio 450/4
    Subwoofer Amplifier: JL Audio 1000/1

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    My adobe acrobat doesn't work so it wont let me see the spec sheet. Could someone check it out n let me know. ive never built a box before, so i might just have someone build one for me



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    Yeh a box for a W7 is not a good beginners box. Anyways here are the specs for the sealed box, which I recommend:

    16 Wide
    19 High
    11.75 Deep

    That's JL specs. Personally I would give it more depth and less height, 19 seems really high. At any rate you want to keep the internal air volume at about 1.4 cu. ft. in order to obtain the bess SQ and SPL from the sealed box.

    Ihope that helps you out



    Headunit: Eclipse CD8443
    Front Stage: Boston Acoustics Z6
    Rear Stage: Boston Acoustics Pro 6.5
    Subwoofer: Dual JL 10W7 Sealed Enclosure
    Mid/High Amplifier: JL Audio 450/4
    Subwoofer Amplifier: JL Audio 1000/1

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    Bumpin03's Avatar
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    yes, that does help me out...thanks
    i dont want anything fancy...just a rectangular box works for me, how much do you think i would be charged at a shop for a box to be made??



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    Depends on the place. It would probably cost around 150$ is it what I would guess. It's partially that expensive because box is for a W7. It seems pricey, probably because it is, but the boxes are really not simple to build because of the double baffle thick baffle and the extra care needed in sealing the box. You really want the box to be real tight if you want it to hold up. I would recommend buying one professionally built unless you know someone who is willing to do it for like real cheap (like material cost only) At any rate if it comes down to the difference between paying someone 80 bucks vs 150, just spend the extra money, you probably won't regret it. Plus if you had enough money to buy a W7, then you should be able to afford the couple extra bucks



    Headunit: Eclipse CD8443
    Front Stage: Boston Acoustics Z6
    Rear Stage: Boston Acoustics Pro 6.5
    Subwoofer: Dual JL 10W7 Sealed Enclosure
    Mid/High Amplifier: JL Audio 450/4
    Subwoofer Amplifier: JL Audio 1000/1

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    if u look aroundthey have a box made ecspecially for the w7, i forgot where, but look around ull find it...



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    its called an HO wedge box and it is made by JL Audio. I have heard the 10W7 HO box in my car. Sounds loud (not as loud as 2 10s tho), but loses lots of SQ. Sealed sounds much better, not quite as loud but still loud. HO box is probly a good choice if you wanted a ported box



    Headunit: Eclipse CD8443
    Front Stage: Boston Acoustics Z6
    Rear Stage: Boston Acoustics Pro 6.5
    Subwoofer: Dual JL 10W7 Sealed Enclosure
    Mid/High Amplifier: JL Audio 450/4
    Subwoofer Amplifier: JL Audio 1000/1

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    the HO ported box has less SQ but more SPL??? How much less SQ??? I now have 2 kenwood kfc-w3003's and am fairly disappointed with the SQ. What do you recommend I should get...ported or sealed?? Where could i find the HO box?? and how much?



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    what about the SubZone enclosure that was made for the 12w7...the link is

    http://www.subzoneusa.com/jl_audio12w7.htm

    would that be any good?



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    OK, well JL makes the HO box for the W7. If you mess around on the site enough you can find it. IMO I didn't like the amount of sound quality I lost for volume gain of the HO box, but it would still waste the quality of 2 kenwood subs in any enclosure. Ive never heard the 12 in a car, but I heard it in a show room in a ported box, and it sounded sort of sloppy. But Im sure that the room didnt help much, and the box just could have been bad. What kind of amp are you pushing this thing with. If you have 750 + good clean watts I would absolutely go with a sealed box atleast at first. If you don't have enough volume then you can upgrade. I'm not sure about the 12s, but my 10s each sound like 2 normal 12s in a sealed box, but with much better SQ. I'm guessing the 12's must put out the volume of 1 15 or maybe 3 12s each. The displacement on these things is very good. Get the right power on that woofer and won't be disappointed. Unfortunately the right power has to be a very large amp with a lot of clean power, therefore also expensive. As far as that subzone box goes, it looks alright. It's a sealed box. Nice for show. Supposedly constructed with 1" MDF all around with is good and solid. Oh yeh BTW the HO box with a 10 W7 costs 700$ (so 150 for the box). I am not sure how much the 12 HO box costs, but I know they make it and I would assume its about the same cost. Personally if you want to go ported, and you are going to be paying for it, I would definitely go with the HO box because I am positive that JL knows what its doing with its own subs and that enclosure probably puts out a good combination between SQ and SPL for a ported box for the W7.

    ~Bobby



    Headunit: Eclipse CD8443
    Front Stage: Boston Acoustics Z6
    Rear Stage: Boston Acoustics Pro 6.5
    Subwoofer: Dual JL 10W7 Sealed Enclosure
    Mid/High Amplifier: JL Audio 450/4
    Subwoofer Amplifier: JL Audio 1000/1

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    Ok...I am going to be running my w7 off a MTX 81000D amp...which is 1500w @ 2ohms....so at 3 ohms its probably around 1100w. So, yes I will be sending lots of power to it. I realized the HO box is about the same size as a regular dual box....the main point of me selling my system was to get a smaller box that would fit in a smaller car. So I don't think I will be going with that. I prefer SPL over SQ...but I definantly don't want the SQ to be bad. If I went sealed...how much would i lose on SPL?? I think I am just going to have to go to my local shop and have them build me one. But...sealed or ported??



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    you got plenty of power for it, actually i wouldnt push that much power to it in a ported box, could be dangerous for the sub. It should be fine in the sealed box though. And it will be very loud as well. You probably lose about 33% volume from a good ported box to a sealed box with the W7, IMO. Hope that helps. BTW where do you live?



    Headunit: Eclipse CD8443
    Front Stage: Boston Acoustics Z6
    Rear Stage: Boston Acoustics Pro 6.5
    Subwoofer: Dual JL 10W7 Sealed Enclosure
    Mid/High Amplifier: JL Audio 450/4
    Subwoofer Amplifier: JL Audio 1000/1

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    in my opinion you both wasted your money on getting a W7 b/c the IDMAX sounds better than the IDMAX in any frequency and can get louder than the W7. the IDMAX is just an all around better woofer that is cheaper and been around longer with a great rep. but that is all just my opinion oh and i would go sealed with a W7 over ported any day bumpin_03, and if you can get a shop to build a box for 150 then it's gonna just be a thrown together box spend some good cash and get a custom built enclosure.

    keep it thumpin,
    adam




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    actually i changed my mind and decided to go with the JBL 1200.1 amp. That should still give it good power. My local shop said they could build me a nice box for around 220. Do you think that would be good enough?



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